Finding the Fourth Proportional to 142,589.48, 213,763.92 and 89,882.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,589.48 : 213,763.92 = 89,882.76 : x
2. Step 2: Convert to fraction form
   142,589.48/213,763.92 = 89,882.76/x
3. Step 3: Cross multiply
   142,589.48x = 213,763.92 × 89,882.76
4. Step 4: Simplify right side
   142,589.48x = 19,213,691,118.02
5. Step 5: Solve for x
   x = 19,213,691,118.02/142,589.48
6. Step 6: Final answer
   x = 134,748.31