Finding the Third Proportional to 3,992,574 and 8,657,764

Step by Step Solution

1. Step 1: Write the proportion equation
   3,992,574 : 8,657,764 = 8,657,764 : x
2. Step 2: Convert to fraction form
   3,992,574/8,657,764 = 8,657,764/x
3. Step 3: Cross multiply
   3,992,574x = 8,657,764 × 8,657,764
4. Step 4: Simplify right side
   3,992,574x = 74,956,877,479,696
5. Step 5: Solve for x
   x = 74,956,877,479,696/3,992,574
6. Step 6: Final answer
   x = 18,774,073.44