Finding the Fourth Proportional to 2,773.28, 4,158.24 and 1,386.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,773.28 : 4,158.24 = 1,386.56 : x
2. Step 2: Convert to fraction form
   2,773.28/4,158.24 = 1,386.56/x
3. Step 3: Cross multiply
   2,773.28x = 4,158.24 × 1,386.56
4. Step 4: Simplify right side
   2,773.28x = 5,765,649.25
5. Step 5: Solve for x
   x = 5,765,649.25/2,773.28
6. Step 6: Final answer
   x = 2,079.00