Finding the Fourth Proportional to 638,501,012.34, 881,157,025.71 and 356,268,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   638,501,012.34 : 881,157,025.71 = 356,268,105.30 : x
2. Step 2: Convert to fraction form
   638,501,012.34/881,157,025.71 = 356,268,105.30/x
3. Step 3: Cross multiply
   638,501,012.34x = 881,157,025.71 × 356,268,105.30
4. Step 4: Simplify right side
   638,501,012.34x = 313,928,144,021,485,120
5. Step 5: Solve for x
   x = 313,928,144,021,485,120/638,501,012.34
6. Step 6: Final answer
   x = 491,664,285.50