Finding the Fourth Proportional to 1,657.87, 2,290.07 and 1,162.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,657.87 : 2,290.07 = 1,162.15 : x
2. Step 2: Convert to fraction form
   1,657.87/2,290.07 = 1,162.15/x
3. Step 3: Cross multiply
   1,657.87x = 2,290.07 × 1,162.15
4. Step 4: Simplify right side
   1,657.87x = 2,661,404.85
5. Step 5: Solve for x
   x = 2,661,404.85/1,657.87
6. Step 6: Final answer
   x = 1,605.32