Finding the Fourth Proportional to 142,422.63, 213,568.17 and 52,442.75

Step by Step Solution

1. Step 1: Write the proportion equation
   142,422.63 : 213,568.17 = 52,442.75 : x
2. Step 2: Convert to fraction form
   142,422.63/213,568.17 = 52,442.75/x
3. Step 3: Cross multiply
   142,422.63x = 213,568.17 × 52,442.75
4. Step 4: Simplify right side
   142,422.63x = 11,200,102,147.27
5. Step 5: Solve for x
   x = 11,200,102,147.27/142,422.63
6. Step 6: Final answer
   x = 78,639.91