Finding the Third Proportional to 576,458 and 866,539.50

Step by Step Solution

1. Step 1: Write the proportion equation
   576,458 : 866,539.50 = 866,539.50 : x
2. Step 2: Convert to fraction form
   576,458/866,539.50 = 866,539.50/x
3. Step 3: Cross multiply
   576,458x = 866,539.50 × 866,539.50
4. Step 4: Simplify right side
   576,458x = 750,890,705,060.25
5. Step 5: Solve for x
   x = 750,890,705,060.25/576,458
6. Step 6: Final answer
   x = 1,302,593.95