Finding the Fourth Proportional to 5,581.30, 8,371.72 and 1,685.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,581.30 : 8,371.72 = 1,685.59 : x
2. Step 2: Convert to fraction form
   5,581.30/8,371.72 = 1,685.59/x
3. Step 3: Cross multiply
   5,581.30x = 8,371.72 × 1,685.59
4. Step 4: Simplify right side
   5,581.30x = 14,111,287.51
5. Step 5: Solve for x
   x = 14,111,287.51/5,581.30
6. Step 6: Final answer
   x = 2,528.32