Finding the Third Proportional to 525,312 and 803,216.25

Step by Step Solution

1. Step 1: Write the proportion equation
   525,312 : 803,216.25 = 803,216.25 : x
2. Step 2: Convert to fraction form
   525,312/803,216.25 = 803,216.25/x
3. Step 3: Cross multiply
   525,312x = 803,216.25 × 803,216.25
4. Step 4: Simplify right side
   525,312x = 645,156,344,264.06
5. Step 5: Solve for x
   x = 645,156,344,264.06/525,312
6. Step 6: Final answer
   x = 1,228,139.36