Finding the Fourth Proportional to 99,715.47, 149,496.53 and 51,632.55

Step by Step Solution

1. Step 1: Write the proportion equation
   99,715.47 : 149,496.53 = 51,632.55 : x
2. Step 2: Convert to fraction form
   99,715.47/149,496.53 = 51,632.55/x
3. Step 3: Cross multiply
   99,715.47x = 149,496.53 × 51,632.55
4. Step 4: Simplify right side
   99,715.47x = 7,718,886,801.89
5. Step 5: Solve for x
   x = 7,718,886,801.89/99,715.47
6. Step 6: Final answer
   x = 77,409.12