Finding the Third Proportional to 521,869.50 and 806,375.25

Step by Step Solution

1. Step 1: Write the proportion equation
   521,869.50 : 806,375.25 = 806,375.25 : x
2. Step 2: Convert to fraction form
   521,869.50/806,375.25 = 806,375.25/x
3. Step 3: Cross multiply
   521,869.50x = 806,375.25 × 806,375.25
4. Step 4: Simplify right side
   521,869.50x = 650,241,043,812.56
5. Step 5: Solve for x
   x = 650,241,043,812.56/521,869.50
6. Step 6: Final answer
   x = 1,245,983.99