Finding the Fourth Proportional to 9,942.32, 13,722.12 and 5,752.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,942.32 : 13,722.12 = 5,752.88 : x
2. Step 2: Convert to fraction form
   9,942.32/13,722.12 = 5,752.88/x
3. Step 3: Cross multiply
   9,942.32x = 13,722.12 × 5,752.88
4. Step 4: Simplify right side
   9,942.32x = 78,941,709.71
5. Step 5: Solve for x
   x = 78,941,709.71/9,942.32
6. Step 6: Final answer
   x = 7,939.97