Finding the Fourth Proportional to 465,826.29, 698,700.43 and 128,871.15

Step by Step Solution

1. Step 1: Write the proportion equation
   465,826.29 : 698,700.43 = 128,871.15 : x
2. Step 2: Convert to fraction form
   465,826.29/698,700.43 = 128,871.15/x
3. Step 3: Cross multiply
   465,826.29x = 698,700.43 × 128,871.15
4. Step 4: Simplify right side
   465,826.29x = 90,042,327,919.59
5. Step 5: Solve for x
   x = 90,042,327,919.59/465,826.29
6. Step 6: Final answer
   x = 193,295.93