Finding the Fourth Proportional to 1,253,672.50, 1,730,068.05 and 717,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253,672.50 : 1,730,068.05 = 717,128.50 : x
2. Step 2: Convert to fraction form
   1,253,672.50/1,730,068.05 = 717,128.50/x
3. Step 3: Cross multiply
   1,253,672.50x = 1,730,068.05 × 717,128.50
4. Step 4: Simplify right side
   1,253,672.50x = 1,240,681,105,594.43
5. Step 5: Solve for x
   x = 1,240,681,105,594.43/1,253,672.50
6. Step 6: Final answer
   x = 989,637.33