Finding the Third Proportional to 5,178,284 and 7,767,431

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178,284 : 7,767,431 = 7,767,431 : x
2. Step 2: Convert to fraction form
   5,178,284/7,767,431 = 7,767,431/x
3. Step 3: Cross multiply
   5,178,284x = 7,767,431 × 7,767,431
4. Step 4: Simplify right side
   5,178,284x = 60,332,984,339,761
5. Step 5: Solve for x
   x = 60,332,984,339,761/5,178,284
6. Step 6: Final answer
   x = 11,651,154.00