Finding the Fourth Proportional to 8,271.89, 12,408.03 and 2,115.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,271.89 : 12,408.03 = 2,115.89 : x
2. Step 2: Convert to fraction form
   8,271.89/12,408.03 = 2,115.89/x
3. Step 3: Cross multiply
   8,271.89x = 12,408.03 × 2,115.89
4. Step 4: Simplify right side
   8,271.89x = 26,254,026.60
5. Step 5: Solve for x
   x = 26,254,026.60/8,271.89
6. Step 6: Final answer
   x = 3,173.88