Finding the Fourth Proportional to 1,298,892.43, 1,792,394.35 and 718,080.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298,892.43 : 1,792,394.35 = 718,080.78 : x
2. Step 2: Convert to fraction form
   1,298,892.43/1,792,394.35 = 718,080.78/x
3. Step 3: Cross multiply
   1,298,892.43x = 1,792,394.35 × 718,080.78
4. Step 4: Simplify right side
   1,298,892.43x = 1,287,083,932,915.59
5. Step 5: Solve for x
   x = 1,287,083,932,915.59/1,298,892.43
6. Step 6: Final answer
   x = 990,908.80