Finding the Fourth Proportional to 9,369.31, 12,929.53 and 5,177.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,369.31 : 12,929.53 = 5,177.47 : x
2. Step 2: Convert to fraction form
   9,369.31/12,929.53 = 5,177.47/x
3. Step 3: Cross multiply
   9,369.31x = 12,929.53 × 5,177.47
4. Step 4: Simplify right side
   9,369.31x = 66,942,253.69
5. Step 5: Solve for x
   x = 66,942,253.69/9,369.31
6. Step 6: Final answer
   x = 7,144.84