Finding the Fourth Proportional to 9,178.58, 13,757.38 and 5,231.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,178.58 : 13,757.38 = 5,231.99 : x
2. Step 2: Convert to fraction form
   9,178.58/13,757.38 = 5,231.99/x
3. Step 3: Cross multiply
   9,178.58x = 13,757.38 × 5,231.99
4. Step 4: Simplify right side
   9,178.58x = 71,978,495.90
5. Step 5: Solve for x
   x = 71,978,495.90/9,178.58
6. Step 6: Final answer
   x = 7,842.01