Finding the Third Proportional to 1,117,220 and 2,428,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,117,220 : 2,428,840 = 2,428,840 : x
2. Step 2: Convert to fraction form
   1,117,220/2,428,840 = 2,428,840/x
3. Step 3: Cross multiply
   1,117,220x = 2,428,840 × 2,428,840
4. Step 4: Simplify right side
   1,117,220x = 5,899,263,745,600
5. Step 5: Solve for x
   x = 5,899,263,745,600/1,117,220
6. Step 6: Final answer
   x = 5,280,306.25