Finding the Fourth Proportional to 12,194.16, 18,278.28 and 5,172.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,194.16 : 18,278.28 = 5,172.72 : x
2. Step 2: Convert to fraction form
   12,194.16/18,278.28 = 5,172.72/x
3. Step 3: Cross multiply
   12,194.16x = 18,278.28 × 5,172.72
4. Step 4: Simplify right side
   12,194.16x = 94,548,424.52
5. Step 5: Solve for x
   x = 94,548,424.52/12,194.16
6. Step 6: Final answer
   x = 7,753.58