Finding the Fourth Proportional to 9,016.52, 12,443.45 and 5,189.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,016.52 : 12,443.45 = 5,189.31 : x
2. Step 2: Convert to fraction form
   9,016.52/12,443.45 = 5,189.31/x
3. Step 3: Cross multiply
   9,016.52x = 12,443.45 × 5,189.31
4. Step 4: Simplify right side
   9,016.52x = 64,572,893.57
5. Step 5: Solve for x
   x = 64,572,893.57/9,016.52
6. Step 6: Final answer
   x = 7,161.62