Finding the Fourth Proportional to 21,998,985.72, 32,997,971.52 and 12,958,433.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,998,985.72 : 32,997,971.52 = 12,958,433.16 : x
2. Step 2: Convert to fraction form
   21,998,985.72/32,997,971.52 = 12,958,433.16/x
3. Step 3: Cross multiply
   21,998,985.72x = 32,997,971.52 × 12,958,433.16
4. Step 4: Simplify right side
   21,998,985.72x = 427,602,008,357,503.62
5. Step 5: Solve for x
   x = 427,602,008,357,503.62/21,998,985.72
6. Step 6: Final answer
   x = 19,437,351.06