Finding the Third Proportional to 356,650 and 554,020

Step by Step Solution

1. Step 1: Write the proportion equation
   356,650 : 554,020 = 554,020 : x
2. Step 2: Convert to fraction form
   356,650/554,020 = 554,020/x
3. Step 3: Cross multiply
   356,650x = 554,020 × 554,020
4. Step 4: Simplify right side
   356,650x = 306,938,160,400
5. Step 5: Solve for x
   x = 306,938,160,400/356,650
6. Step 6: Final answer
   x = 860,614.50