Finding the Third Proportional to 8,690,225 and 13,147,164

Step by Step Solution

1. Step 1: Write the proportion equation
   8,690,225 : 13,147,164 = 13,147,164 : x
2. Step 2: Convert to fraction form
   8,690,225/13,147,164 = 13,147,164/x
3. Step 3: Cross multiply
   8,690,225x = 13,147,164 × 13,147,164
4. Step 4: Simplify right side
   8,690,225x = 172,847,921,242,896
5. Step 5: Solve for x
   x = 172,847,921,242,896/8,690,225
6. Step 6: Final answer
   x = 19,889,924.74