Finding the Fourth Proportional to 13,029.50, 17,980.71 and 7,440.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,029.50 : 17,980.71 = 7,440.50 : x
2. Step 2: Convert to fraction form
   13,029.50/17,980.71 = 7,440.50/x
3. Step 3: Cross multiply
   13,029.50x = 17,980.71 × 7,440.50
4. Step 4: Simplify right side
   13,029.50x = 133,785,472.76
5. Step 5: Solve for x
   x = 133,785,472.76/13,029.50
6. Step 6: Final answer
   x = 10,267.89