Finding the Third Proportional to 515,391 and 802,522.50

Step by Step Solution

1. Step 1: Write the proportion equation
   515,391 : 802,522.50 = 802,522.50 : x
2. Step 2: Convert to fraction form
   515,391/802,522.50 = 802,522.50/x
3. Step 3: Cross multiply
   515,391x = 802,522.50 × 802,522.50
4. Step 4: Simplify right side
   515,391x = 644,042,363,006.25
5. Step 5: Solve for x
   x = 644,042,363,006.25/515,391
6. Step 6: Final answer
   x = 1,249,618.96