Finding the Fourth Proportional to 1,665.74, 2,481.98 and 1,591.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.74 : 2,481.98 = 1,591.22 : x
2. Step 2: Convert to fraction form
   1,665.74/2,481.98 = 1,591.22/x
3. Step 3: Cross multiply
   1,665.74x = 2,481.98 × 1,591.22
4. Step 4: Simplify right side
   1,665.74x = 3,949,376.22
5. Step 5: Solve for x
   x = 3,949,376.22/1,665.74
6. Step 6: Final answer
   x = 2,370.94