Finding the Fourth Proportional to 2,774.31, 4,158.39 and 1,388.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,774.31 : 4,158.39 = 1,388.82 : x
2. Step 2: Convert to fraction form
   2,774.31/4,158.39 = 1,388.82/x
3. Step 3: Cross multiply
   2,774.31x = 4,158.39 × 1,388.82
4. Step 4: Simplify right side
   2,774.31x = 5,775,255.20
5. Step 5: Solve for x
   x = 5,775,255.20/2,774.31
6. Step 6: Final answer
   x = 2,081.69