Finding the Fourth Proportional to 1,665.59, 2,502.63 and 1,258.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.59 : 2,502.63 = 1,258.56 : x
2. Step 2: Convert to fraction form
   1,665.59/2,502.63 = 1,258.56/x
3. Step 3: Cross multiply
   1,665.59x = 2,502.63 × 1,258.56
4. Step 4: Simplify right side
   1,665.59x = 3,149,710.01
5. Step 5: Solve for x
   x = 3,149,710.01/1,665.59
6. Step 6: Final answer
   x = 1,891.05