Finding the Fourth Proportional to 12,147.84, 18,207.60 and 5,574.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,147.84 : 18,207.60 = 5,574.72 : x
2. Step 2: Convert to fraction form
   12,147.84/18,207.60 = 5,574.72/x
3. Step 3: Cross multiply
   12,147.84x = 18,207.60 × 5,574.72
4. Step 4: Simplify right side
   12,147.84x = 101,502,271.87
5. Step 5: Solve for x
   x = 101,502,271.87/12,147.84
6. Step 6: Final answer
   x = 8,355.58