Finding the Third Proportional to 57,243.38 and 84,209.63

Step by Step Solution

1. Step 1: Write the proportion equation
   57,243.38 : 84,209.63 = 84,209.63 : x
2. Step 2: Convert to fraction form
   57,243.38/84,209.63 = 84,209.63/x
3. Step 3: Cross multiply
   57,243.38x = 84,209.63 × 84,209.63
4. Step 4: Simplify right side
   57,243.38x = 7,091,260,942.64
5. Step 5: Solve for x
   x = 7,091,260,942.64/57,243.38
6. Step 6: Final answer
   x = 123,879.16