Finding the Third Proportional to 8,218,942 and 13,089,488

Step by Step Solution

1. Step 1: Write the proportion equation
   8,218,942 : 13,089,488 = 13,089,488 : x
2. Step 2: Convert to fraction form
   8,218,942/13,089,488 = 13,089,488/x
3. Step 3: Cross multiply
   8,218,942x = 13,089,488 × 13,089,488
4. Step 4: Simplify right side
   8,218,942x = 171,334,696,102,144
5. Step 5: Solve for x
   x = 171,334,696,102,144/8,218,942
6. Step 6: Final answer
   x = 20,846,320.13