Finding the Fourth Proportional to 142,158.64, 213,311.76 and 57,980.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,158.64 : 213,311.76 = 57,980.56 : x
2. Step 2: Convert to fraction form
   142,158.64/213,311.76 = 57,980.56/x
3. Step 3: Cross multiply
   142,158.64x = 213,311.76 × 57,980.56
4. Step 4: Simplify right side
   142,158.64x = 12,367,935,299.39
5. Step 5: Solve for x
   x = 12,367,935,299.39/142,158.64
6. Step 6: Final answer
   x = 87,000.94