Finding the Fourth Proportional to 142,641.72, 213,893.31 and 71,533.86

Step by Step Solution

1. Step 1: Write the proportion equation
   142,641.72 : 213,893.31 = 71,533.86 : x
2. Step 2: Convert to fraction form
   142,641.72/213,893.31 = 71,533.86/x
3. Step 3: Cross multiply
   142,641.72x = 213,893.31 × 71,533.86
4. Step 4: Simplify right side
   142,641.72x = 15,300,614,092.48
5. Step 5: Solve for x
   x = 15,300,614,092.48/142,641.72
6. Step 6: Final answer
   x = 107,266.05