Finding the Fourth Proportional to 9,321.78, 13,984.72 and 4,057.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.78 : 13,984.72 = 4,057.63 : x
2. Step 2: Convert to fraction form
   9,321.78/13,984.72 = 4,057.63/x
3. Step 3: Cross multiply
   9,321.78x = 13,984.72 × 4,057.63
4. Step 4: Simplify right side
   9,321.78x = 56,744,774.31
5. Step 5: Solve for x
   x = 56,744,774.31/9,321.78
6. Step 6: Final answer
   x = 6,087.33