Finding the Fourth Proportional to 8,939.89, 12,328.47 and 5,354.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,939.89 : 12,328.47 = 5,354.27 : x
2. Step 2: Convert to fraction form
   8,939.89/12,328.47 = 5,354.27/x
3. Step 3: Cross multiply
   8,939.89x = 12,328.47 × 5,354.27
4. Step 4: Simplify right side
   8,939.89x = 66,009,962.76
5. Step 5: Solve for x
   x = 66,009,962.76/8,939.89
6. Step 6: Final answer
   x = 7,383.76