Finding the Fourth Proportional to 908,139.30, 1,363,521.15 and 685,065.30

Step by Step Solution

1. Step 1: Write the proportion equation
   908,139.30 : 1,363,521.15 = 685,065.30 : x
2. Step 2: Convert to fraction form
   908,139.30/1,363,521.15 = 685,065.30/x
3. Step 3: Cross multiply
   908,139.30x = 1,363,521.15 × 685,065.30
4. Step 4: Simplify right side
   908,139.30x = 934,101,025,681.10
5. Step 5: Solve for x
   x = 934,101,025,681.10/908,139.30
6. Step 6: Final answer
   x = 1,028,587.82