Finding the Fourth Proportional to 8,806.43, 12,155.18 and 5,447.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,806.43 : 12,155.18 = 5,447.30 : x
2. Step 2: Convert to fraction form
   8,806.43/12,155.18 = 5,447.30/x
3. Step 3: Cross multiply
   8,806.43x = 12,155.18 × 5,447.30
4. Step 4: Simplify right side
   8,806.43x = 66,212,824.00
5. Step 5: Solve for x
   x = 66,212,824.00/8,806.43
6. Step 6: Final answer
   x = 7,518.69