Finding the Fourth Proportional to 12,488.56, 18,734.15 and 4,165.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.56 : 18,734.15 = 4,165.67 : x
2. Step 2: Convert to fraction form
   12,488.56/18,734.15 = 4,165.67/x
3. Step 3: Cross multiply
   12,488.56x = 18,734.15 × 4,165.67
4. Step 4: Simplify right side
   12,488.56x = 78,040,343.88
5. Step 5: Solve for x
   x = 78,040,343.88/12,488.56
6. Step 6: Final answer
   x = 6,248.95