Finding the Fourth Proportional to 142,389.31, 213,614.61 and 42,557.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,389.31 : 213,614.61 = 42,557.62 : x
2. Step 2: Convert to fraction form
   142,389.31/213,614.61 = 42,557.62/x
3. Step 3: Cross multiply
   142,389.31x = 213,614.61 × 42,557.62
4. Step 4: Simplify right side
   142,389.31x = 9,090,929,398.83
5. Step 5: Solve for x
   x = 9,090,929,398.83/142,389.31
6. Step 6: Final answer
   x = 63,845.59