Finding the Third Proportional to 987,840 and 2,156,472

Step by Step Solution

1. Step 1: Write the proportion equation
   987,840 : 2,156,472 = 2,156,472 : x
2. Step 2: Convert to fraction form
   987,840/2,156,472 = 2,156,472/x
3. Step 3: Cross multiply
   987,840x = 2,156,472 × 2,156,472
4. Step 4: Simplify right side
   987,840x = 4,650,371,486,784
5. Step 5: Solve for x
   x = 4,650,371,486,784/987,840
6. Step 6: Final answer
   x = 4,707,616.10