Finding the Fourth Proportional to 9,120.74, 12,586.37 and 5,141.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.74 : 12,586.37 = 5,141.61 : x
2. Step 2: Convert to fraction form
   9,120.74/12,586.37 = 5,141.61/x
3. Step 3: Cross multiply
   9,120.74x = 12,586.37 × 5,141.61
4. Step 4: Simplify right side
   9,120.74x = 64,714,180.15
5. Step 5: Solve for x
   x = 64,714,180.15/9,120.74
6. Step 6: Final answer
   x = 7,095.28