Finding the Fourth Proportional to 9,121.69, 12,587.82 and 5,144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,121.69 : 12,587.82 = 5,144.09 : x
2. Step 2: Convert to fraction form
   9,121.69/12,587.82 = 5,144.09/x
3. Step 3: Cross multiply
   9,121.69x = 12,587.82 × 5,144.09
4. Step 4: Simplify right side
   9,121.69x = 64,752,796.75
5. Step 5: Solve for x
   x = 64,752,796.75/9,121.69
6. Step 6: Final answer
   x = 7,098.77