Finding the Fourth Proportional to 9,489.72, 13,095.90 and 5,511

Step by Step Solution

1. Step 1: Write the proportion equation
   9,489.72 : 13,095.90 = 5,511 : x
2. Step 2: Convert to fraction form
   9,489.72/13,095.90 = 5,511/x
3. Step 3: Cross multiply
   9,489.72x = 13,095.90 × 5,511
4. Step 4: Simplify right side
   9,489.72x = 72,171,504.90
5. Step 5: Solve for x
   x = 72,171,504.90/9,489.72
6. Step 6: Final answer
   x = 7,605.23