Finding the Fourth Proportional to 9,992.56, 13,789.83 and 5,516.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992.56 : 13,789.83 = 5,516.21 : x
2. Step 2: Convert to fraction form
   9,992.56/13,789.83 = 5,516.21/x
3. Step 3: Cross multiply
   9,992.56x = 13,789.83 × 5,516.21
4. Step 4: Simplify right side
   9,992.56x = 76,067,611.93
5. Step 5: Solve for x
   x = 76,067,611.93/9,992.56
6. Step 6: Final answer
   x = 7,612.43