Finding the Third Proportional to 1,048.78 and 2,231.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.78 : 2,231.72 = 2,231.72 : x
2. Step 2: Convert to fraction form
   1,048.78/2,231.72 = 2,231.72/x
3. Step 3: Cross multiply
   1,048.78x = 2,231.72 × 2,231.72
4. Step 4: Simplify right side
   1,048.78x = 4,980,568.58
5. Step 5: Solve for x
   x = 4,980,568.58/1,048.78
6. Step 6: Final answer
   x = 4,748.91