Finding the Fourth Proportional to 2,026.72, 2,796.96 and 1,328.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,026.72 : 2,796.96 = 1,328.80 : x
2. Step 2: Convert to fraction form
   2,026.72/2,796.96 = 1,328.80/x
3. Step 3: Cross multiply
   2,026.72x = 2,796.96 × 1,328.80
4. Step 4: Simplify right side
   2,026.72x = 3,716,600.45
5. Step 5: Solve for x
   x = 3,716,600.45/2,026.72
6. Step 6: Final answer
   x = 1,833.80