Finding the Fourth Proportional to 9,983.79, 13,778.43 and 5,508.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,983.79 : 13,778.43 = 5,508.42 : x
2. Step 2: Convert to fraction form
   9,983.79/13,778.43 = 5,508.42/x
3. Step 3: Cross multiply
   9,983.79x = 13,778.43 × 5,508.42
4. Step 4: Simplify right side
   9,983.79x = 75,897,379.38
5. Step 5: Solve for x
   x = 75,897,379.38/9,983.79
6. Step 6: Final answer
   x = 7,602.06