Finding the Third Proportional to 5,490,220 and 7,920,366

Step by Step Solution

1. Step 1: Write the proportion equation
   5,490,220 : 7,920,366 = 7,920,366 : x
2. Step 2: Convert to fraction form
   5,490,220/7,920,366 = 7,920,366/x
3. Step 3: Cross multiply
   5,490,220x = 7,920,366 × 7,920,366
4. Step 4: Simplify right side
   5,490,220x = 62,732,197,573,956
5. Step 5: Solve for x
   x = 62,732,197,573,956/5,490,220
6. Step 6: Final answer
   x = 11,426,171.92