Finding the Fourth Proportional to 142,158.28, 213,228.76 and 42,318.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,158.28 : 213,228.76 = 42,318.76 : x
2. Step 2: Convert to fraction form
   142,158.28/213,228.76 = 42,318.76/x
3. Step 3: Cross multiply
   142,158.28x = 213,228.76 × 42,318.76
4. Step 4: Simplify right side
   142,158.28x = 9,023,576,719.54
5. Step 5: Solve for x
   x = 9,023,576,719.54/142,158.28
6. Step 6: Final answer
   x = 63,475.56