Finding the Third Proportional to 5,387,716 and 8,364,881

Step by Step Solution

1. Step 1: Write the proportion equation
   5,387,716 : 8,364,881 = 8,364,881 : x
2. Step 2: Convert to fraction form
   5,387,716/8,364,881 = 8,364,881/x
3. Step 3: Cross multiply
   5,387,716x = 8,364,881 × 8,364,881
4. Step 4: Simplify right side
   5,387,716x = 69,971,234,144,161
5. Step 5: Solve for x
   x = 69,971,234,144,161/5,387,716
6. Step 6: Final answer
   x = 12,987,179.38