Finding the Fourth Proportional to 12,107.28, 18,168.72 and 5,181.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,107.28 : 18,168.72 = 5,181.84 : x
2. Step 2: Convert to fraction form
   12,107.28/18,168.72 = 5,181.84/x
3. Step 3: Cross multiply
   12,107.28x = 18,168.72 × 5,181.84
4. Step 4: Simplify right side
   12,107.28x = 94,147,400.04
5. Step 5: Solve for x
   x = 94,147,400.04/12,107.28
6. Step 6: Final answer
   x = 7,776.10