Finding the Fourth Proportional to 2,026.48, 2,796.56 and 1,187.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,026.48 : 2,796.56 = 1,187.20 : x
2. Step 2: Convert to fraction form
   2,026.48/2,796.56 = 1,187.20/x
3. Step 3: Cross multiply
   2,026.48x = 2,796.56 × 1,187.20
4. Step 4: Simplify right side
   2,026.48x = 3,320,076.03
5. Step 5: Solve for x
   x = 3,320,076.03/2,026.48
6. Step 6: Final answer
   x = 1,638.35