Finding the Fourth Proportional to 141,920.16, 195,862.96 and 81,498.72

Step by Step Solution

1. Step 1: Write the proportion equation
   141,920.16 : 195,862.96 = 81,498.72 : x
2. Step 2: Convert to fraction form
   141,920.16/195,862.96 = 81,498.72/x
3. Step 3: Cross multiply
   141,920.16x = 195,862.96 × 81,498.72
4. Step 4: Simplify right side
   141,920.16x = 15,962,580,535.41
5. Step 5: Solve for x
   x = 15,962,580,535.41/141,920.16
6. Step 6: Final answer
   x = 112,475.78