Finding the Fourth Proportional to 9,992.36, 13,790.86 and 5,744.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992.36 : 13,790.86 = 5,744.72 : x
2. Step 2: Convert to fraction form
   9,992.36/13,790.86 = 5,744.72/x
3. Step 3: Cross multiply
   9,992.36x = 13,790.86 × 5,744.72
4. Step 4: Simplify right side
   9,992.36x = 79,224,649.37
5. Step 5: Solve for x
   x = 79,224,649.37/9,992.36
6. Step 6: Final answer
   x = 7,928.52