Finding the Third Proportional to 1,147.78 and 2,380.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.78 : 2,380.78 = 2,380.78 : x
2. Step 2: Convert to fraction form
   1,147.78/2,380.78 = 2,380.78/x
3. Step 3: Cross multiply
   1,147.78x = 2,380.78 × 2,380.78
4. Step 4: Simplify right side
   1,147.78x = 5,668,119.36
5. Step 5: Solve for x
   x = 5,668,119.36/1,147.78
6. Step 6: Final answer
   x = 4,938.33