Finding the Fourth Proportional to 8,919.22, 13,374.42 and 5,222.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,919.22 : 13,374.42 = 5,222.38 : x
2. Step 2: Convert to fraction form
   8,919.22/13,374.42 = 5,222.38/x
3. Step 3: Cross multiply
   8,919.22x = 13,374.42 × 5,222.38
4. Step 4: Simplify right side
   8,919.22x = 69,846,303.52
5. Step 5: Solve for x
   x = 69,846,303.52/8,919.22
6. Step 6: Final answer
   x = 7,830.99