Finding the Fourth Proportional to 141,517.53, 195,322.10 and 81,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   141,517.53 : 195,322.10 = 81,128.72 : x
2. Step 2: Convert to fraction form
   141,517.53/195,322.10 = 81,128.72/x
3. Step 3: Cross multiply
   141,517.53x = 195,322.10 × 81,128.72
4. Step 4: Simplify right side
   141,517.53x = 15,846,230,578.46
5. Step 5: Solve for x
   x = 15,846,230,578.46/141,517.53
6. Step 6: Final answer
   x = 111,973.62