Finding the Third Proportional to 722,280 and 1,555,560

Step by Step Solution

1. Step 1: Write the proportion equation
   722,280 : 1,555,560 = 1,555,560 : x
2. Step 2: Convert to fraction form
   722,280/1,555,560 = 1,555,560/x
3. Step 3: Cross multiply
   722,280x = 1,555,560 × 1,555,560
4. Step 4: Simplify right side
   722,280x = 2,419,766,913,600
5. Step 5: Solve for x
   x = 2,419,766,913,600/722,280
6. Step 6: Final answer
   x = 3,350,178.48