Finding the Fourth Proportional to 12,147.74, 18,222.73 and 4,752.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,147.74 : 18,222.73 = 4,752.78 : x
2. Step 2: Convert to fraction form
   12,147.74/18,222.73 = 4,752.78/x
3. Step 3: Cross multiply
   12,147.74x = 18,222.73 × 4,752.78
4. Step 4: Simplify right side
   12,147.74x = 86,608,626.69
5. Step 5: Solve for x
   x = 86,608,626.69/12,147.74
6. Step 6: Final answer
   x = 7,129.61