Finding the Third Proportional to 3,922.17 and 7,798.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,922.17 : 7,798.78 = 7,798.78 : x
2. Step 2: Convert to fraction form
   3,922.17/7,798.78 = 7,798.78/x
3. Step 3: Cross multiply
   3,922.17x = 7,798.78 × 7,798.78
4. Step 4: Simplify right side
   3,922.17x = 60,820,988.99
5. Step 5: Solve for x
   x = 60,820,988.99/3,922.17
6. Step 6: Final answer
   x = 15,506.97