Finding the Fourth Proportional to 142,654.38, 213,955.65 and 42,791.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,654.38 : 213,955.65 = 42,791.10 : x
2. Step 2: Convert to fraction form
   142,654.38/213,955.65 = 42,791.10/x
3. Step 3: Cross multiply
   142,654.38x = 213,955.65 × 42,791.10
4. Step 4: Simplify right side
   142,654.38x = 9,155,397,614.72
5. Step 5: Solve for x
   x = 9,155,397,614.72/142,654.38
6. Step 6: Final answer
   x = 64,178.87