Finding the Fourth Proportional to 1,665.21, 2,295.56 and 1,310.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.21 : 2,295.56 = 1,310.46 : x
2. Step 2: Convert to fraction form
   1,665.21/2,295.56 = 1,310.46/x
3. Step 3: Cross multiply
   1,665.21x = 2,295.56 × 1,310.46
4. Step 4: Simplify right side
   1,665.21x = 3,008,233.01
5. Step 5: Solve for x
   x = 3,008,233.01/1,665.21
6. Step 6: Final answer
   x = 1,806.52