Finding the Fourth Proportional to 2,259.44, 3,111.09 and 1,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.44 : 3,111.09 = 1,978.10 : x
2. Step 2: Convert to fraction form
   2,259.44/3,111.09 = 1,978.10/x
3. Step 3: Cross multiply
   2,259.44x = 3,111.09 × 1,978.10
4. Step 4: Simplify right side
   2,259.44x = 6,154,047.13
5. Step 5: Solve for x
   x = 6,154,047.13/2,259.44
6. Step 6: Final answer
   x = 2,723.70