Finding the Fourth Proportional to 8,840.61, 12,200.27 and 5,485.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,840.61 : 12,200.27 = 5,485.05 : x
2. Step 2: Convert to fraction form
   8,840.61/12,200.27 = 5,485.05/x
3. Step 3: Cross multiply
   8,840.61x = 12,200.27 × 5,485.05
4. Step 4: Simplify right side
   8,840.61x = 66,919,063.54
5. Step 5: Solve for x
   x = 66,919,063.54/8,840.61
6. Step 6: Final answer
   x = 7,569.51