Finding the Fourth Proportional to 7,222.32, 10,806.52 and 5,147.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,222.32 : 10,806.52 = 5,147.12 : x
2. Step 2: Convert to fraction form
   7,222.32/10,806.52 = 5,147.12/x
3. Step 3: Cross multiply
   7,222.32x = 10,806.52 × 5,147.12
4. Step 4: Simplify right side
   7,222.32x = 55,622,455.22
5. Step 5: Solve for x
   x = 55,622,455.22/7,222.32
6. Step 6: Final answer
   x = 7,701.47