Finding the Third Proportional to 489,216 and 748,414.50

Step by Step Solution

1. Step 1: Write the proportion equation
   489,216 : 748,414.50 = 748,414.50 : x
2. Step 2: Convert to fraction form
   489,216/748,414.50 = 748,414.50/x
3. Step 3: Cross multiply
   489,216x = 748,414.50 × 748,414.50
4. Step 4: Simplify right side
   489,216x = 560,124,263,810.25
5. Step 5: Solve for x
   x = 560,124,263,810.25/489,216
6. Step 6: Final answer
   x = 1,144,942.65