Finding the Fourth Proportional to 12,072.64, 18,117.52 and 5,499.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,072.64 : 18,117.52 = 5,499.68 : x
2. Step 2: Convert to fraction form
   12,072.64/18,117.52 = 5,499.68/x
3. Step 3: Cross multiply
   12,072.64x = 18,117.52 × 5,499.68
4. Step 4: Simplify right side
   12,072.64x = 99,640,562.39
5. Step 5: Solve for x
   x = 99,640,562.39/12,072.64
6. Step 6: Final answer
   x = 8,253.42