Finding the Fourth Proportional to 13,357.72, 18,433.71 and 7,389.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,357.72 : 18,433.71 = 7,389.59 : x
2. Step 2: Convert to fraction form
   13,357.72/18,433.71 = 7,389.59/x
3. Step 3: Cross multiply
   13,357.72x = 18,433.71 × 7,389.59
4. Step 4: Simplify right side
   13,357.72x = 136,217,605.16
5. Step 5: Solve for x
   x = 136,217,605.16/13,357.72
6. Step 6: Final answer
   x = 10,197.67