Finding the Third Proportional to 487,915 and 1,057,280

Step by Step Solution

1. Step 1: Write the proportion equation
   487,915 : 1,057,280 = 1,057,280 : x
2. Step 2: Convert to fraction form
   487,915/1,057,280 = 1,057,280/x
3. Step 3: Cross multiply
   487,915x = 1,057,280 × 1,057,280
4. Step 4: Simplify right side
   487,915x = 1,117,840,998,400
5. Step 5: Solve for x
   x = 1,117,840,998,400/487,915
6. Step 6: Final answer
   x = 2,291,056.84