Finding the Fourth Proportional to 1,658.72, 2,290.20 and 1,100.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.72 : 2,290.20 = 1,100.35 : x
2. Step 2: Convert to fraction form
   1,658.72/2,290.20 = 1,100.35/x
3. Step 3: Cross multiply
   1,658.72x = 2,290.20 × 1,100.35
4. Step 4: Simplify right side
   1,658.72x = 2,520,013.74
5. Step 5: Solve for x
   x = 2,520,013.74/1,658.72
6. Step 6: Final answer
   x = 1,519.26