Finding the Fourth Proportional to 9,912.48, 13,675.32 and 5,719.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,912.48 : 13,675.32 = 5,719.92 : x
2. Step 2: Convert to fraction form
   9,912.48/13,675.32 = 5,719.92/x
3. Step 3: Cross multiply
   9,912.48x = 13,675.32 × 5,719.92
4. Step 4: Simplify right side
   9,912.48x = 78,221,736.37
5. Step 5: Solve for x
   x = 78,221,736.37/9,912.48
6. Step 6: Final answer
   x = 7,891.24