Finding the Fourth Proportional to 1,107.57, 1,517.38 and 1,066.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.57 : 1,517.38 = 1,066.05 : x
2. Step 2: Convert to fraction form
   1,107.57/1,517.38 = 1,066.05/x
3. Step 3: Cross multiply
   1,107.57x = 1,517.38 × 1,066.05
4. Step 4: Simplify right side
   1,107.57x = 1,617,600.28
5. Step 5: Solve for x
   x = 1,617,600.28/1,107.57
6. Step 6: Final answer
   x = 1,460.49