Finding the Fourth Proportional to 8,409.58, 12,658.22 and 7,141.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,409.58 : 12,658.22 = 7,141.12 : x
2. Step 2: Convert to fraction form
   8,409.58/12,658.22 = 7,141.12/x
3. Step 3: Cross multiply
   8,409.58x = 12,658.22 × 7,141.12
4. Step 4: Simplify right side
   8,409.58x = 90,393,868.01
5. Step 5: Solve for x
   x = 90,393,868.01/8,409.58
6. Step 6: Final answer
   x = 10,748.92