Finding the Third Proportional to 366,639 and 766,762.50

Step by Step Solution

1. Step 1: Write the proportion equation
   366,639 : 766,762.50 = 766,762.50 : x
2. Step 2: Convert to fraction form
   366,639/766,762.50 = 766,762.50/x
3. Step 3: Cross multiply
   366,639x = 766,762.50 × 766,762.50
4. Step 4: Simplify right side
   366,639x = 587,924,731,406.25
5. Step 5: Solve for x
   x = 587,924,731,406.25/366,639
6. Step 6: Final answer
   x = 1,603,552.08