Finding the Fourth Proportional to 142,160.28, 213,231.76 and 42,320.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,160.28 : 213,231.76 = 42,320.76 : x
2. Step 2: Convert to fraction form
   142,160.28/213,231.76 = 42,320.76/x
3. Step 3: Cross multiply
   142,160.28x = 213,231.76 × 42,320.76
4. Step 4: Simplify right side
   142,160.28x = 9,024,130,139.34
5. Step 5: Solve for x
   x = 9,024,130,139.34/142,160.28
6. Step 6: Final answer
   x = 63,478.56