Finding the Fourth Proportional to 9,964.29, 13,750.27 and 5,712.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,964.29 : 13,750.27 = 5,712.30 : x
2. Step 2: Convert to fraction form
   9,964.29/13,750.27 = 5,712.30/x
3. Step 3: Cross multiply
   9,964.29x = 13,750.27 × 5,712.30
4. Step 4: Simplify right side
   9,964.29x = 78,545,667.32
5. Step 5: Solve for x
   x = 78,545,667.32/9,964.29
6. Step 6: Final answer
   x = 7,882.72