Finding the Fourth Proportional to 1,665.48, 2,294.52 and 1,587.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.48 : 2,294.52 = 1,587.72 : x
2. Step 2: Convert to fraction form
   1,665.48/2,294.52 = 1,587.72/x
3. Step 3: Cross multiply
   1,665.48x = 2,294.52 × 1,587.72
4. Step 4: Simplify right side
   1,665.48x = 3,643,055.29
5. Step 5: Solve for x
   x = 3,643,055.29/1,665.48
6. Step 6: Final answer
   x = 2,187.39