Finding the Fourth Proportional to 9,933.12, 13,706.72 and 5,742.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,933.12 : 13,706.72 = 5,742.72 : x
2. Step 2: Convert to fraction form
   9,933.12/13,706.72 = 5,742.72/x
3. Step 3: Cross multiply
   9,933.12x = 13,706.72 × 5,742.72
4. Step 4: Simplify right side
   9,933.12x = 78,713,855.08
5. Step 5: Solve for x
   x = 78,713,855.08/9,933.12
6. Step 6: Final answer
   x = 7,924.38