Finding the Third Proportional to 16,490,486 and 25,678,047

Step by Step Solution

1. Step 1: Write the proportion equation
   16,490,486 : 25,678,047 = 25,678,047 : x
2. Step 2: Convert to fraction form
   16,490,486/25,678,047 = 25,678,047/x
3. Step 3: Cross multiply
   16,490,486x = 25,678,047 × 25,678,047
4. Step 4: Simplify right side
   16,490,486x = 659,362,097,734,209
5. Step 5: Solve for x
   x = 659,362,097,734,209/16,490,486
6. Step 6: Final answer
   x = 39,984,394.50