Finding the Fourth Proportional to 13,326.72, 18,393.12 and 7,740.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,326.72 : 18,393.12 = 7,740.96 : x
2. Step 2: Convert to fraction form
   13,326.72/18,393.12 = 7,740.96/x
3. Step 3: Cross multiply
   13,326.72x = 18,393.12 × 7,740.96
4. Step 4: Simplify right side
   13,326.72x = 142,380,406.20
5. Step 5: Solve for x
   x = 142,380,406.20/13,326.72
6. Step 6: Final answer
   x = 10,683.83