Finding the Fourth Proportional to 85,700.38, 118,273.36 and 63,142.42

Step by Step Solution

1. Step 1: Write the proportion equation
   85,700.38 : 118,273.36 = 63,142.42 : x
2. Step 2: Convert to fraction form
   85,700.38/118,273.36 = 63,142.42/x
3. Step 3: Cross multiply
   85,700.38x = 118,273.36 × 63,142.42
4. Step 4: Simplify right side
   85,700.38x = 7,468,066,171.93
5. Step 5: Solve for x
   x = 7,468,066,171.93/85,700.38
6. Step 6: Final answer
   x = 87,141.58