Finding the Third Proportional to 516,321 and 743,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   516,321 : 743,647.50 = 743,647.50 : x
2. Step 2: Convert to fraction form
   516,321/743,647.50 = 743,647.50/x
3. Step 3: Cross multiply
   516,321x = 743,647.50 × 743,647.50
4. Step 4: Simplify right side
   516,321x = 553,011,604,256.25
5. Step 5: Solve for x
   x = 553,011,604,256.25/516,321
6. Step 6: Final answer
   x = 1,071,061.62