Finding the Fourth Proportional to 9,511.04, 13,121.52 and 5,531.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,511.04 : 13,121.52 = 5,531.42 : x
2. Step 2: Convert to fraction form
   9,511.04/13,121.52 = 5,531.42/x
3. Step 3: Cross multiply
   9,511.04x = 13,121.52 × 5,531.42
4. Step 4: Simplify right side
   9,511.04x = 72,580,638.16
5. Step 5: Solve for x
   x = 72,580,638.16/9,511.04
6. Step 6: Final answer
   x = 7,631.20