Finding the Fourth Proportional to 12,940.30, 17,852.43 and 8,158.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.30 : 17,852.43 = 8,158.67 : x
2. Step 2: Convert to fraction form
   12,940.30/17,852.43 = 8,158.67/x
3. Step 3: Cross multiply
   12,940.30x = 17,852.43 × 8,158.67
4. Step 4: Simplify right side
   12,940.30x = 145,652,085.07
5. Step 5: Solve for x
   x = 145,652,085.07/12,940.30
6. Step 6: Final answer
   x = 11,255.70