Finding the Fourth Proportional to 12,179.78, 18,271.58 and 5,159.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,179.78 : 18,271.58 = 5,159.81 : x
2. Step 2: Convert to fraction form
   12,179.78/18,271.58 = 5,159.81/x
3. Step 3: Cross multiply
   12,179.78x = 18,271.58 × 5,159.81
4. Step 4: Simplify right side
   12,179.78x = 94,277,855.40
5. Step 5: Solve for x
   x = 94,277,855.40/12,179.78
6. Step 6: Final answer
   x = 7,740.52