Finding the Fourth Proportional to 465,442.47, 698,149.76 and 128,503.69

Step by Step Solution

1. Step 1: Write the proportion equation
   465,442.47 : 698,149.76 = 128,503.69 : x
2. Step 2: Convert to fraction form
   465,442.47/698,149.76 = 128,503.69/x
3. Step 3: Cross multiply
   465,442.47x = 698,149.76 × 128,503.69
4. Step 4: Simplify right side
   465,442.47x = 89,714,817,944.72
5. Step 5: Solve for x
   x = 89,714,817,944.72/465,442.47
6. Step 6: Final answer
   x = 192,751.68