Finding the Fourth Proportional to 13,307.90, 18,364.78 and 7,339.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.90 : 18,364.78 = 7,339.82 : x
2. Step 2: Convert to fraction form
   13,307.90/18,364.78 = 7,339.82/x
3. Step 3: Cross multiply
   13,307.90x = 18,364.78 × 7,339.82
4. Step 4: Simplify right side
   13,307.90x = 134,794,179.54
5. Step 5: Solve for x
   x = 134,794,179.54/13,307.90
6. Step 6: Final answer
   x = 10,128.88