Finding the Fourth Proportional to 9,120.55, 12,586.20 and 5,141.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.55 : 12,586.20 = 5,141.67 : x
2. Step 2: Convert to fraction form
   9,120.55/12,586.20 = 5,141.67/x
3. Step 3: Cross multiply
   9,120.55x = 12,586.20 × 5,141.67
4. Step 4: Simplify right side
   9,120.55x = 64,714,067.67
5. Step 5: Solve for x
   x = 64,714,067.67/9,120.55
6. Step 6: Final answer
   x = 7,095.41