Finding the Fourth Proportional to 1,260,597.52, 1,739,635.72 and 687,640.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,260,597.52 : 1,739,635.72 = 687,640.24 : x
2. Step 2: Convert to fraction form
   1,260,597.52/1,739,635.72 = 687,640.24/x
3. Step 3: Cross multiply
   1,260,597.52x = 1,739,635.72 × 687,640.24
4. Step 4: Simplify right side
   1,260,597.52x = 1,196,243,524,013.37
5. Step 5: Solve for x
   x = 1,196,243,524,013.37/1,260,597.52
6. Step 6: Final answer
   x = 948,949.61