Finding the Fourth Proportional to 141,899.28, 195,838.72 and 81,488.80

Step by Step Solution

1. Step 1: Write the proportion equation
   141,899.28 : 195,838.72 = 81,488.80 : x
2. Step 2: Convert to fraction form
   141,899.28/195,838.72 = 81,488.80/x
3. Step 3: Cross multiply
   141,899.28x = 195,838.72 × 81,488.80
4. Step 4: Simplify right side
   141,899.28x = 15,958,662,286.34
5. Step 5: Solve for x
   x = 15,958,662,286.34/141,899.28
6. Step 6: Final answer
   x = 112,464.72