Finding the Third Proportional to 5,402,147 and 8,240,420

Step by Step Solution

1. Step 1: Write the proportion equation
   5,402,147 : 8,240,420 = 8,240,420 : x
2. Step 2: Convert to fraction form
   5,402,147/8,240,420 = 8,240,420/x
3. Step 3: Cross multiply
   5,402,147x = 8,240,420 × 8,240,420
4. Step 4: Simplify right side
   5,402,147x = 67,904,521,776,400
5. Step 5: Solve for x
   x = 67,904,521,776,400/5,402,147
6. Step 6: Final answer
   x = 12,569,913.74