Finding the Fourth Proportional to 142,228.92, 213,343.29 and 42,386.55

Step by Step Solution

1. Step 1: Write the proportion equation
   142,228.92 : 213,343.29 = 42,386.55 : x
2. Step 2: Convert to fraction form
   142,228.92/213,343.29 = 42,386.55/x
3. Step 3: Cross multiply
   142,228.92x = 213,343.29 × 42,386.55
4. Step 4: Simplify right side
   142,228.92x = 9,042,886,028.75
5. Step 5: Solve for x
   x = 9,042,886,028.75/142,228.92
6. Step 6: Final answer
   x = 63,579.80