Finding the Fourth Proportional to 13,411.98, 18,509.70 and 7,444.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,411.98 : 18,509.70 = 7,444.80 : x
2. Step 2: Convert to fraction form
   13,411.98/18,509.70 = 7,444.80/x
3. Step 3: Cross multiply
   13,411.98x = 18,509.70 × 7,444.80
4. Step 4: Simplify right side
   13,411.98x = 137,801,014.56
5. Step 5: Solve for x
   x = 137,801,014.56/13,411.98
6. Step 6: Final answer
   x = 10,274.47