Finding the Third Proportional to 57,240.25 and 84,146.38

Step by Step Solution

1. Step 1: Write the proportion equation
   57,240.25 : 84,146.38 = 84,146.38 : x
2. Step 2: Convert to fraction form
   57,240.25/84,146.38 = 84,146.38/x
3. Step 3: Cross multiply
   57,240.25x = 84,146.38 × 84,146.38
4. Step 4: Simplify right side
   57,240.25x = 7,080,612,425.64
5. Step 5: Solve for x
   x = 7,080,612,425.64/57,240.25
6. Step 6: Final answer
   x = 123,699.89