Finding the Fourth Proportional to 2,728.80, 4,088.88 and 1,426.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.80 : 4,088.88 = 1,426.32 : x
2. Step 2: Convert to fraction form
   2,728.80/4,088.88 = 1,426.32/x
3. Step 3: Cross multiply
   2,728.80x = 4,088.88 × 1,426.32
4. Step 4: Simplify right side
   2,728.80x = 5,832,051.32
5. Step 5: Solve for x
   x = 5,832,051.32/2,728.80
6. Step 6: Final answer
   x = 2,137.22