Finding the Third Proportional to 489,020 and 748,061

Step by Step Solution

1. Step 1: Write the proportion equation
   489,020 : 748,061 = 748,061 : x
2. Step 2: Convert to fraction form
   489,020/748,061 = 748,061/x
3. Step 3: Cross multiply
   489,020x = 748,061 × 748,061
4. Step 4: Simplify right side
   489,020x = 559,595,259,721
5. Step 5: Solve for x
   x = 559,595,259,721/489,020
6. Step 6: Final answer
   x = 1,144,319.78