Finding the Fourth Proportional to 9,992.36, 13,789.40 and 5,455.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992.36 : 13,789.40 = 5,455.05 : x
2. Step 2: Convert to fraction form
   9,992.36/13,789.40 = 5,455.05/x
3. Step 3: Cross multiply
   9,992.36x = 13,789.40 × 5,455.05
4. Step 4: Simplify right side
   9,992.36x = 75,221,839.19
5. Step 5: Solve for x
   x = 75,221,839.19/9,992.36
6. Step 6: Final answer
   x = 7,527.94