Finding the Fourth Proportional to 9,920.70, 13,690.82 and 5,444.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.70 : 13,690.82 = 5,444.42 : x
2. Step 2: Convert to fraction form
   9,920.70/13,690.82 = 5,444.42/x
3. Step 3: Cross multiply
   9,920.70x = 13,690.82 × 5,444.42
4. Step 4: Simplify right side
   9,920.70x = 74,538,519.38
5. Step 5: Solve for x
   x = 74,538,519.38/9,920.70
6. Step 6: Final answer
   x = 7,513.43