Finding the Fourth Proportional to 12,071.18, 18,108.49 and 4,572.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,071.18 : 18,108.49 = 4,572.72 : x
2. Step 2: Convert to fraction form
   12,071.18/18,108.49 = 4,572.72/x
3. Step 3: Cross multiply
   12,071.18x = 18,108.49 × 4,572.72
4. Step 4: Simplify right side
   12,071.18x = 82,805,054.39
5. Step 5: Solve for x
   x = 82,805,054.39/12,071.18
6. Step 6: Final answer
   x = 6,859.73