Finding the Fourth Proportional to 13,393.89, 18,483.39 and 7,425.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,393.89 : 18,483.39 = 7,425.54 : x
2. Step 2: Convert to fraction form
   13,393.89/18,483.39 = 7,425.54/x
3. Step 3: Cross multiply
   13,393.89x = 18,483.39 × 7,425.54
4. Step 4: Simplify right side
   13,393.89x = 137,249,151.78
5. Step 5: Solve for x
   x = 137,249,151.78/13,393.89
6. Step 6: Final answer
   x = 10,247.15