Finding the Fourth Proportional to 141,978.88, 195,919.36 and 81,530.24

Step by Step Solution

1. Step 1: Write the proportion equation
   141,978.88 : 195,919.36 = 81,530.24 : x
2. Step 2: Convert to fraction form
   141,978.88/195,919.36 = 81,530.24/x
3. Step 3: Cross multiply
   141,978.88x = 195,919.36 × 81,530.24
4. Step 4: Simplify right side
   141,978.88x = 15,973,352,441.45
5. Step 5: Solve for x
   x = 15,973,352,441.45/141,978.88
6. Step 6: Final answer
   x = 112,505.13