Finding the Third Proportional to 489,739.50 and 748,674

Step by Step Solution

1. Step 1: Write the proportion equation
   489,739.50 : 748,674 = 748,674 : x
2. Step 2: Convert to fraction form
   489,739.50/748,674 = 748,674/x
3. Step 3: Cross multiply
   489,739.50x = 748,674 × 748,674
4. Step 4: Simplify right side
   489,739.50x = 560,512,758,276
5. Step 5: Solve for x
   x = 560,512,758,276/489,739.50
6. Step 6: Final answer
   x = 1,144,512.05