Finding the Fourth Proportional to 465,442.64, 698,150.04 and 128,503.82

Step by Step Solution

1. Step 1: Write the proportion equation
   465,442.64 : 698,150.04 = 128,503.82 : x
2. Step 2: Convert to fraction form
   465,442.64/698,150.04 = 128,503.82/x
3. Step 3: Cross multiply
   465,442.64x = 698,150.04 × 128,503.82
4. Step 4: Simplify right side
   465,442.64x = 89,714,947,073.15
5. Step 5: Solve for x
   x = 89,714,947,073.15/465,442.64
6. Step 6: Final answer
   x = 192,751.89