Finding the Fourth Proportional to 8,273.54, 12,385.71 and 5,490.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,273.54 : 12,385.71 = 5,490.59 : x
2. Step 2: Convert to fraction form
   8,273.54/12,385.71 = 5,490.59/x
3. Step 3: Cross multiply
   8,273.54x = 12,385.71 × 5,490.59
4. Step 4: Simplify right side
   8,273.54x = 68,004,793.54
5. Step 5: Solve for x
   x = 68,004,793.54/8,273.54
6. Step 6: Final answer
   x = 8,219.55