Finding the Fourth Proportional to 9,121.41, 12,587.18 and 5,143.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,121.41 : 12,587.18 = 5,143.37 : x
2. Step 2: Convert to fraction form
   9,121.41/12,587.18 = 5,143.37/x
3. Step 3: Cross multiply
   9,121.41x = 12,587.18 × 5,143.37
4. Step 4: Simplify right side
   9,121.41x = 64,740,435.34
5. Step 5: Solve for x
   x = 64,740,435.34/9,121.41
6. Step 6: Final answer
   x = 7,097.63