Finding the Third Proportional to 3,559.78 and 7,803.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,559.78 : 7,803.84 = 7,803.84 : x
2. Step 2: Convert to fraction form
   3,559.78/7,803.84 = 7,803.84/x
3. Step 3: Cross multiply
   3,559.78x = 7,803.84 × 7,803.84
4. Step 4: Simplify right side
   3,559.78x = 60,899,977.27
5. Step 5: Solve for x
   x = 60,899,977.27/3,559.78
6. Step 6: Final answer
   x = 17,107.79