Finding the Fourth Proportional to 9,992.45, 13,789.41 and 5,516.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992.45 : 13,789.41 = 5,516.63 : x
2. Step 2: Convert to fraction form
   9,992.45/13,789.41 = 5,516.63/x
3. Step 3: Cross multiply
   9,992.45x = 13,789.41 × 5,516.63
4. Step 4: Simplify right side
   9,992.45x = 76,071,072.89
5. Step 5: Solve for x
   x = 76,071,072.89/9,992.45
6. Step 6: Final answer
   x = 7,612.85