Finding the Fourth Proportional to 1,078,943.31, 1,618,414.52 and 320,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,943.31 : 1,618,414.52 = 320,781.50 : x
2. Step 2: Convert to fraction form
   1,078,943.31/1,618,414.52 = 320,781.50/x
3. Step 3: Cross multiply
   1,078,943.31x = 1,618,414.52 × 320,781.50
4. Step 4: Simplify right side
   1,078,943.31x = 519,157,427,651.40
5. Step 5: Solve for x
   x = 519,157,427,651.40/1,078,943.31
6. Step 6: Final answer
   x = 481,172.11