Finding the Fourth Proportional to 2,371.31, 3,271.90 and 1,587.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,371.31 : 3,271.90 = 1,587.64 : x
2. Step 2: Convert to fraction form
   2,371.31/3,271.90 = 1,587.64/x
3. Step 3: Cross multiply
   2,371.31x = 3,271.90 × 1,587.64
4. Step 4: Simplify right side
   2,371.31x = 5,194,575.02
5. Step 5: Solve for x
   x = 5,194,575.02/2,371.31
6. Step 6: Final answer
   x = 2,190.59