Finding the Fourth Proportional to 13,308.49, 18,365.35 and 7,340.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.49 : 18,365.35 = 7,340.05 : x
2. Step 2: Convert to fraction form
   13,308.49/18,365.35 = 7,340.05/x
3. Step 3: Cross multiply
   13,308.49x = 18,365.35 × 7,340.05
4. Step 4: Simplify right side
   13,308.49x = 134,802,587.27
5. Step 5: Solve for x
   x = 134,802,587.27/13,308.49
6. Step 6: Final answer
   x = 10,129.07