Finding the Fourth Proportional to 1,665.13, 2,297.55 and 1,134.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.13 : 2,297.55 = 1,134.40 : x
2. Step 2: Convert to fraction form
   1,665.13/2,297.55 = 1,134.40/x
3. Step 3: Cross multiply
   1,665.13x = 2,297.55 × 1,134.40
4. Step 4: Simplify right side
   1,665.13x = 2,606,340.72
5. Step 5: Solve for x
   x = 2,606,340.72/1,665.13
6. Step 6: Final answer
   x = 1,565.25