Finding the Fourth Proportional to 8,280.51, 11,431.82 and 5,456.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280.51 : 11,431.82 = 5,456.09 : x
2. Step 2: Convert to fraction form
   8,280.51/11,431.82 = 5,456.09/x
3. Step 3: Cross multiply
   8,280.51x = 11,431.82 × 5,456.09
4. Step 4: Simplify right side
   8,280.51x = 62,372,954.34
5. Step 5: Solve for x
   x = 62,372,954.34/8,280.51
6. Step 6: Final answer
   x = 7,532.50