Finding the Third Proportional to 8,538,746 and 13,207,131

Step by Step Solution

1. Step 1: Write the proportion equation
   8,538,746 : 13,207,131 = 13,207,131 : x
2. Step 2: Convert to fraction form
   8,538,746/13,207,131 = 13,207,131/x
3. Step 3: Cross multiply
   8,538,746x = 13,207,131 × 13,207,131
4. Step 4: Simplify right side
   8,538,746x = 174,428,309,251,161
5. Step 5: Solve for x
   x = 174,428,309,251,161/8,538,746
6. Step 6: Final answer
   x = 20,427,860.16