Finding the Fourth Proportional to 2,259.56, 3,111.26 and 1,978.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.56 : 3,111.26 = 1,978.22 : x
2. Step 2: Convert to fraction form
   2,259.56/3,111.26 = 1,978.22/x
3. Step 3: Cross multiply
   2,259.56x = 3,111.26 × 1,978.22
4. Step 4: Simplify right side
   2,259.56x = 6,154,756.76
5. Step 5: Solve for x
   x = 6,154,756.76/2,259.56
6. Step 6: Final answer
   x = 2,723.87