Finding the Third Proportional to 1,279.13 and 1,900.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.13 : 1,900.55 = 1,900.55 : x
2. Step 2: Convert to fraction form
   1,279.13/1,900.55 = 1,900.55/x
3. Step 3: Cross multiply
   1,279.13x = 1,900.55 × 1,900.55
4. Step 4: Simplify right side
   1,279.13x = 3,612,078.42
5. Step 5: Solve for x
   x = 3,612,078.42/1,279.13
6. Step 6: Final answer
   x = 2,823.87