Finding the Fourth Proportional to 2,978.88, 4,443.84 and 2,543.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.88 : 4,443.84 = 2,543.28 : x
2. Step 2: Convert to fraction form
   2,978.88/4,443.84 = 2,543.28/x
3. Step 3: Cross multiply
   2,978.88x = 4,443.84 × 2,543.28
4. Step 4: Simplify right side
   2,978.88x = 11,301,929.40
5. Step 5: Solve for x
   x = 11,301,929.40/2,978.88
6. Step 6: Final answer
   x = 3,794.02