Finding the Third Proportional to 4,499,591 and 9,899,686

Step by Step Solution

1. Step 1: Write the proportion equation
   4,499,591 : 9,899,686 = 9,899,686 : x
2. Step 2: Convert to fraction form
   4,499,591/9,899,686 = 9,899,686/x
3. Step 3: Cross multiply
   4,499,591x = 9,899,686 × 9,899,686
4. Step 4: Simplify right side
   4,499,591x = 98,003,782,898,596
5. Step 5: Solve for x
   x = 98,003,782,898,596/4,499,591
6. Step 6: Final answer
   x = 21,780,598.04