Finding the Third Proportional to 111,665.25 and 243,013.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,665.25 : 243,013.50 = 243,013.50 : x
2. Step 2: Convert to fraction form
   111,665.25/243,013.50 = 243,013.50/x
3. Step 3: Cross multiply
   111,665.25x = 243,013.50 × 243,013.50
4. Step 4: Simplify right side
   111,665.25x = 59,055,561,182.25
5. Step 5: Solve for x
   x = 59,055,561,182.25/111,665.25
6. Step 6: Final answer
   x = 528,862.48