Finding the Third Proportional to 109,398 and 253,417.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,398 : 253,417.50 = 253,417.50 : x
2. Step 2: Convert to fraction form
   109,398/253,417.50 = 253,417.50/x
3. Step 3: Cross multiply
   109,398x = 253,417.50 × 253,417.50
4. Step 4: Simplify right side
   109,398x = 64,220,429,306.25
5. Step 5: Solve for x
   x = 64,220,429,306.25/109,398
6. Step 6: Final answer
   x = 587,034.77