Finding the Fourth Proportional to 9,121.62, 12,587.76 and 5,142.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,121.62 : 12,587.76 = 5,142.54 : x
2. Step 2: Convert to fraction form
   9,121.62/12,587.76 = 5,142.54/x
3. Step 3: Cross multiply
   9,121.62x = 12,587.76 × 5,142.54
4. Step 4: Simplify right side
   9,121.62x = 64,733,059.31
5. Step 5: Solve for x
   x = 64,733,059.31/9,121.62
6. Step 6: Final answer
   x = 7,096.66