Finding the Fourth Proportional to 9,964.52, 13,751.07 and 5,715.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,964.52 : 13,751.07 = 5,715.74 : x
2. Step 2: Convert to fraction form
   9,964.52/13,751.07 = 5,715.74/x
3. Step 3: Cross multiply
   9,964.52x = 13,751.07 × 5,715.74
4. Step 4: Simplify right side
   9,964.52x = 78,597,472.09
5. Step 5: Solve for x
   x = 78,597,472.09/9,964.52
6. Step 6: Final answer
   x = 7,887.74