Finding the Fourth Proportional to 12,166.72, 18,250.25 and 5,145.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,166.72 : 18,250.25 = 5,145.85 : x
2. Step 2: Convert to fraction form
   12,166.72/18,250.25 = 5,145.85/x
3. Step 3: Cross multiply
   12,166.72x = 18,250.25 × 5,145.85
4. Step 4: Simplify right side
   12,166.72x = 93,912,931.98
5. Step 5: Solve for x
   x = 93,912,931.98/12,166.72
6. Step 6: Final answer
   x = 7,718.84