Finding the Third Proportional to 530,221 and 803,053.50

Step by Step Solution

1. Step 1: Write the proportion equation
   530,221 : 803,053.50 = 803,053.50 : x
2. Step 2: Convert to fraction form
   530,221/803,053.50 = 803,053.50/x
3. Step 3: Cross multiply
   530,221x = 803,053.50 × 803,053.50
4. Step 4: Simplify right side
   530,221x = 644,894,923,862.25
5. Step 5: Solve for x
   x = 644,894,923,862.25/530,221
6. Step 6: Final answer
   x = 1,216,275.71