Finding the Fourth Proportional to 142,238.31, 196,294.50 and 81,808.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,238.31 : 196,294.50 = 81,808.88 : x
2. Step 2: Convert to fraction form
   142,238.31/196,294.50 = 81,808.88/x
3. Step 3: Cross multiply
   142,238.31x = 196,294.50 × 81,808.88
4. Step 4: Simplify right side
   142,238.31x = 16,058,633,195.16
5. Step 5: Solve for x
   x = 16,058,633,195.16/142,238.31
6. Step 6: Final answer
   x = 112,899.49