Finding the Fourth Proportional to 142,007.13, 213,073.61 and 75,431.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,007.13 : 213,073.61 = 75,431.34 : x
2. Step 2: Convert to fraction form
   142,007.13/213,073.61 = 75,431.34/x
3. Step 3: Cross multiply
   142,007.13x = 213,073.61 × 75,431.34
4. Step 4: Simplify right side
   142,007.13x = 16,072,427,543.78
5. Step 5: Solve for x
   x = 16,072,427,543.78/142,007.13
6. Step 6: Final answer
   x = 113,180.43