Finding the Third Proportional to 5,178,286 and 7,767,434

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,286 : 7,767,434 = 7,767,434 : x
2. Step 2: Convert to fraction form
   5,178,286/7,767,434 = 7,767,434/x
3. Step 3: Cross multiply
   5,178,286x = 7,767,434 × 7,767,434
4. Step 4: Simplify right side
   5,178,286x = 60,333,030,944,356
5. Step 5: Solve for x
   x = 60,333,030,944,356/5,178,286
6. Step 6: Final answer
   x = 11,651,158.50