Finding the Fourth Proportional to 1,665.06, 2,480.13 and 1,580.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.06 : 2,480.13 = 1,580.82 : x
2. Step 2: Convert to fraction form
   1,665.06/2,480.13 = 1,580.82/x
3. Step 3: Cross multiply
   1,665.06x = 2,480.13 × 1,580.82
4. Step 4: Simplify right side
   1,665.06x = 3,920,639.11
5. Step 5: Solve for x
   x = 3,920,639.11/1,665.06
6. Step 6: Final answer
   x = 2,354.65