Finding the Fourth Proportional to 9,107.34, 13,658.31 and 3,912

Step by Step Solution

1. Step 1: Write the proportion equation
   9,107.34 : 13,658.31 = 3,912 : x
2. Step 2: Convert to fraction form
   9,107.34/13,658.31 = 3,912/x
3. Step 3: Cross multiply
   9,107.34x = 13,658.31 × 3,912
4. Step 4: Simplify right side
   9,107.34x = 53,431,308.72
5. Step 5: Solve for x
   x = 53,431,308.72/9,107.34
6. Step 6: Final answer
   x = 5,866.84