Finding the Fourth Proportional to 1,665.08, 2,500.60 and 1,580.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.08 : 2,500.60 = 1,580.04 : x
2. Step 2: Convert to fraction form
   1,665.08/2,500.60 = 1,580.04/x
3. Step 3: Cross multiply
   1,665.08x = 2,500.60 × 1,580.04
4. Step 4: Simplify right side
   1,665.08x = 3,951,048.02
5. Step 5: Solve for x
   x = 3,951,048.02/1,665.08
6. Step 6: Final answer
   x = 2,372.89