Finding the Third Proportional to 489,778 and 742,061

Step by Step Solution

1. Step 1: Write the proportion equation
   489,778 : 742,061 = 742,061 : x
2. Step 2: Convert to fraction form
   489,778/742,061 = 742,061/x
3. Step 3: Cross multiply
   489,778x = 742,061 × 742,061
4. Step 4: Simplify right side
   489,778x = 550,654,527,721
5. Step 5: Solve for x
   x = 550,654,527,721/489,778
6. Step 6: Final answer
   x = 1,124,294.12