Finding the Fourth Proportional to 13,307.55, 18,364.17 and 7,339.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.55 : 18,364.17 = 7,339.79 : x
2. Step 2: Convert to fraction form
   13,307.55/18,364.17 = 7,339.79/x
3. Step 3: Cross multiply
   13,307.55x = 18,364.17 × 7,339.79
4. Step 4: Simplify right side
   13,307.55x = 134,789,059.50
5. Step 5: Solve for x
   x = 134,789,059.50/13,307.55
6. Step 6: Final answer
   x = 10,128.77