Finding the Third Proportional to 489,348 and 748,647.56

Step by Step Solution

1. Step 1: Write the proportion equation
   489,348 : 748,647.56 = 748,647.56 : x
2. Step 2: Convert to fraction form
   489,348/748,647.56 = 748,647.56/x
3. Step 3: Cross multiply
   489,348x = 748,647.56 × 748,647.56
4. Step 4: Simplify right side
   489,348x = 560,473,172,837.19
5. Step 5: Solve for x
   x = 560,473,172,837.19/489,348
6. Step 6: Final answer
   x = 1,145,346.81