Finding the Fourth Proportional to 728,761.19, 1,005,685.59 and 402,091.03

Step by Step Solution

1. Step 1: Write the proportion equation
   728,761.19 : 1,005,685.59 = 402,091.03 : x
2. Step 2: Convert to fraction form
   728,761.19/1,005,685.59 = 402,091.03/x
3. Step 3: Cross multiply
   728,761.19x = 1,005,685.59 × 402,091.03
4. Step 4: Simplify right side
   728,761.19x = 404,377,152,225.04
5. Step 5: Solve for x
   x = 404,377,152,225.04/728,761.19
6. Step 6: Final answer
   x = 554,882.94