Finding the Fourth Proportional to 9,992.70, 13,789.86 and 5,516.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,992.70 : 13,789.86 = 5,516.45 : x
2. Step 2: Convert to fraction form
   9,992.70/13,789.86 = 5,516.45/x
3. Step 3: Cross multiply
   9,992.70x = 13,789.86 × 5,516.45
4. Step 4: Simplify right side
   9,992.70x = 76,071,035.27
5. Step 5: Solve for x
   x = 76,071,035.27/9,992.70
6. Step 6: Final answer
   x = 7,612.66