Finding the Fourth Proportional to 2,066.78, 2,852.16 and 1,135.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.78 : 2,852.16 = 1,135.28 : x
2. Step 2: Convert to fraction form
   2,066.78/2,852.16 = 1,135.28/x
3. Step 3: Cross multiply
   2,066.78x = 2,852.16 × 1,135.28
4. Step 4: Simplify right side
   2,066.78x = 3,238,000.20
5. Step 5: Solve for x
   x = 3,238,000.20/2,066.78
6. Step 6: Final answer
   x = 1,566.69