Finding the Fourth Proportional to 13,240.50, 18,271.80 and 7,935.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,240.50 : 18,271.80 = 7,935.31 : x
2. Step 2: Convert to fraction form
   13,240.50/18,271.80 = 7,935.31/x
3. Step 3: Cross multiply
   13,240.50x = 18,271.80 × 7,935.31
4. Step 4: Simplify right side
   13,240.50x = 144,992,420.10
5. Step 5: Solve for x
   x = 144,992,420.10/13,240.50
6. Step 6: Final answer
   x = 10,950.68