Finding the Fourth Proportional to 911,139.32, 1,256,073.12 and 706,829.78

Step by Step Solution

1. Step 1: Write the proportion equation
   911,139.32 : 1,256,073.12 = 706,829.78 : x
2. Step 2: Convert to fraction form
   911,139.32/1,256,073.12 = 706,829.78/x
3. Step 3: Cross multiply
   911,139.32x = 1,256,073.12 × 706,829.78
4. Step 4: Simplify right side
   911,139.32x = 887,829,880,793.15
5. Step 5: Solve for x
   x = 887,829,880,793.15/911,139.32
6. Step 6: Final answer
   x = 974,417.27