Finding the Third Proportional to 409,518 and 620,002.50

Step by Step Solution

1. Step 1: Write the proportion equation
   409,518 : 620,002.50 = 620,002.50 : x
2. Step 2: Convert to fraction form
   409,518/620,002.50 = 620,002.50/x
3. Step 3: Cross multiply
   409,518x = 620,002.50 × 620,002.50
4. Step 4: Simplify right side
   409,518x = 384,403,100,006.25
5. Step 5: Solve for x
   x = 384,403,100,006.25/409,518
6. Step 6: Final answer
   x = 938,672.05