Finding the Fourth Proportional to 1,782.28, 2,459.14 and 1,279.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,782.28 : 2,459.14 = 1,279.72 : x
2. Step 2: Convert to fraction form
   1,782.28/2,459.14 = 1,279.72/x
3. Step 3: Cross multiply
   1,782.28x = 2,459.14 × 1,279.72
4. Step 4: Simplify right side
   1,782.28x = 3,147,010.64
5. Step 5: Solve for x
   x = 3,147,010.64/1,782.28
6. Step 6: Final answer
   x = 1,765.72