Finding the Fourth Proportional to 142,499.18, 213,679.74 and 58,225.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,499.18 : 213,679.74 = 58,225.88 : x
2. Step 2: Convert to fraction form
   142,499.18/213,679.74 = 58,225.88/x
3. Step 3: Cross multiply
   142,499.18x = 213,679.74 × 58,225.88
4. Step 4: Simplify right side
   142,499.18x = 12,441,690,899.67
5. Step 5: Solve for x
   x = 12,441,690,899.67/142,499.18
6. Step 6: Final answer
   x = 87,310.61