Finding the Fourth Proportional to 13,379.74, 18,458.25 and 8,071.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,379.74 : 18,458.25 = 8,071.61 : x
2. Step 2: Convert to fraction form
   13,379.74/18,458.25 = 8,071.61/x
3. Step 3: Cross multiply
   13,379.74x = 18,458.25 × 8,071.61
4. Step 4: Simplify right side
   13,379.74x = 148,987,672.72
5. Step 5: Solve for x
   x = 148,987,672.72/13,379.74
6. Step 6: Final answer
   x = 11,135.32