Finding the Fourth Proportional to 8,083.30, 12,105.48 and 5,478.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,083.30 : 12,105.48 = 5,478.34 : x
2. Step 2: Convert to fraction form
   8,083.30/12,105.48 = 5,478.34/x
3. Step 3: Cross multiply
   8,083.30x = 12,105.48 × 5,478.34
4. Step 4: Simplify right side
   8,083.30x = 66,317,935.30
5. Step 5: Solve for x
   x = 66,317,935.30/8,083.30
6. Step 6: Final answer
   x = 8,204.31