Finding the Fourth Proportional to 13,272.16, 18,311.52 and 7,682.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,272.16 : 18,311.52 = 7,682.08 : x
2. Step 2: Convert to fraction form
   13,272.16/18,311.52 = 7,682.08/x
3. Step 3: Cross multiply
   13,272.16x = 18,311.52 × 7,682.08
4. Step 4: Simplify right side
   13,272.16x = 140,670,561.56
5. Step 5: Solve for x
   x = 140,670,561.56/13,272.16
6. Step 6: Final answer
   x = 10,598.92