Finding the Third Proportional to 538,713.50 and 803,398

Step by Step Solution

1. Step 1: Write the proportion equation
   538,713.50 : 803,398 = 803,398 : x
2. Step 2: Convert to fraction form
   538,713.50/803,398 = 803,398/x
3. Step 3: Cross multiply
   538,713.50x = 803,398 × 803,398
4. Step 4: Simplify right side
   538,713.50x = 645,448,346,404
5. Step 5: Solve for x
   x = 645,448,346,404/538,713.50
6. Step 6: Final answer
   x = 1,198,129.15