Finding the Fourth Proportional to 1,665.30, 2,295.73 and 1,310.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.30 : 2,295.73 = 1,310.61 : x
2. Step 2: Convert to fraction form
   1,665.30/2,295.73 = 1,310.61/x
3. Step 3: Cross multiply
   1,665.30x = 2,295.73 × 1,310.61
4. Step 4: Simplify right side
   1,665.30x = 3,008,806.70
5. Step 5: Solve for x
   x = 3,008,806.70/1,665.30
6. Step 6: Final answer
   x = 1,806.77