Finding the Fourth Proportional to 142,839.57, 214,228.60 and 58,517.05

Step by Step Solution

1. Step 1: Write the proportion equation
   142,839.57 : 214,228.60 = 58,517.05 : x
2. Step 2: Convert to fraction form
   142,839.57/214,228.60 = 58,517.05/x
3. Step 3: Cross multiply
   142,839.57x = 214,228.60 × 58,517.05
4. Step 4: Simplify right side
   142,839.57x = 12,536,025,697.63
5. Step 5: Solve for x
   x = 12,536,025,697.63/142,839.57
6. Step 6: Final answer
   x = 87,762.98