Finding the Fourth Proportional to 9,120.59, 12,586.42 and 5,141.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.59 : 12,586.42 = 5,141.73 : x
2. Step 2: Convert to fraction form
   9,120.59/12,586.42 = 5,141.73/x
3. Step 3: Cross multiply
   9,120.59x = 12,586.42 × 5,141.73
4. Step 4: Simplify right side
   9,120.59x = 64,715,973.31
5. Step 5: Solve for x
   x = 64,715,973.31/9,120.59
6. Step 6: Final answer
   x = 7,095.59