Finding the Fourth Proportional to 9,713.05, 13,399.42 and 5,731.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,713.05 : 13,399.42 = 5,731.51 : x
2. Step 2: Convert to fraction form
   9,713.05/13,399.42 = 5,731.51/x
3. Step 3: Cross multiply
   9,713.05x = 13,399.42 × 5,731.51
4. Step 4: Simplify right side
   9,713.05x = 76,798,909.72
5. Step 5: Solve for x
   x = 76,798,909.72/9,713.05
6. Step 6: Final answer
   x = 7,906.78