Finding the Fourth Proportional to 9,234.78, 13,857.69 and 3,391.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,234.78 : 13,857.69 = 3,391.98 : x
2. Step 2: Convert to fraction form
   9,234.78/13,857.69 = 3,391.98/x
3. Step 3: Cross multiply
   9,234.78x = 13,857.69 × 3,391.98
4. Step 4: Simplify right side
   9,234.78x = 47,005,007.33
5. Step 5: Solve for x
   x = 47,005,007.33/9,234.78
6. Step 6: Final answer
   x = 5,090.00