Finding the Fourth Proportional to 465,443.47, 698,151.25 and 128,504.69

Step by Step Solution

1. Step 1: Write the proportion equation
   465,443.47 : 698,151.25 = 128,504.69 : x
2. Step 2: Convert to fraction form
   465,443.47/698,151.25 = 128,504.69/x
3. Step 3: Cross multiply
   465,443.47x = 698,151.25 × 128,504.69
4. Step 4: Simplify right side
   465,443.47x = 89,715,709,954.36
5. Step 5: Solve for x
   x = 89,715,709,954.36/465,443.47
6. Step 6: Final answer
   x = 192,753.18