Finding the Fourth Proportional to 13,399.98, 18,491.69 and 7,431.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,399.98 : 18,491.69 = 7,431.52 : x
2. Step 2: Convert to fraction form
   13,399.98/18,491.69 = 7,431.52/x
3. Step 3: Cross multiply
   13,399.98x = 18,491.69 × 7,431.52
4. Step 4: Simplify right side
   13,399.98x = 137,421,423.10
5. Step 5: Solve for x
   x = 137,421,423.10/13,399.98
6. Step 6: Final answer
   x = 10,255.34