Finding the Third Proportional to 3,992,572 and 8,657,760

Step by Step Solution

1. Step 1: Write the proportion equation
   3,992,572 : 8,657,760 = 8,657,760 : x
2. Step 2: Convert to fraction form
   3,992,572/8,657,760 = 8,657,760/x
3. Step 3: Cross multiply
   3,992,572x = 8,657,760 × 8,657,760
4. Step 4: Simplify right side
   3,992,572x = 74,956,808,217,600
5. Step 5: Solve for x
   x = 74,956,808,217,600/3,992,572
6. Step 6: Final answer
   x = 18,774,065.49