Finding the Fourth Proportional to 21,242,958,971.30, 29,328,515,814.59 and 13,522,388,004.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,242,958,971.30 : 29,328,515,814.59 = 13,522,388,004.10 : x
2. Step 2: Convert to fraction form
   21,242,958,971.30/29,328,515,814.59 = 13,522,388,004.10/x
3. Step 3: Cross multiply
   21,242,958,971.30x = 29,328,515,814.59 × 13,522,388,004.10
4. Step 4: Simplify right side
   21,242,958,971.30x = 396,591,570,429,268,983,808
5. Step 5: Solve for x
   x = 396,591,570,429,268,983,808/21,242,958,971.30
6. Step 6: Final answer
   x = 18,669,318,665.31