Finding the Third Proportional to 57,238.25 and 84,142.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,238.25 : 84,142.75 = 84,142.75 : x
2. Step 2: Convert to fraction form
   57,238.25/84,142.75 = 84,142.75/x
3. Step 3: Cross multiply
   57,238.25x = 84,142.75 × 84,142.75
4. Step 4: Simplify right side
   57,238.25x = 7,080,002,377.56
5. Step 5: Solve for x
   x = 7,080,002,377.56/57,238.25
6. Step 6: Final answer
   x = 123,693.55