Finding the Fourth Proportional to 1,660.13, 2,290.25 and 1,100.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,660.13 : 2,290.25 = 1,100.69 : x
2. Step 2: Convert to fraction form
   1,660.13/2,290.25 = 1,100.69/x
3. Step 3: Cross multiply
   1,660.13x = 2,290.25 × 1,100.69
4. Step 4: Simplify right side
   1,660.13x = 2,520,849.77
5. Step 5: Solve for x
   x = 2,520,849.77/1,660.13
6. Step 6: Final answer
   x = 1,518.47