Finding the Fourth Proportional to 9,920.61, 13,690.94 and 5,444.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.61 : 13,690.94 = 5,444.33 : x
2. Step 2: Convert to fraction form
   9,920.61/13,690.94 = 5,444.33/x
3. Step 3: Cross multiply
   9,920.61x = 13,690.94 × 5,444.33
4. Step 4: Simplify right side
   9,920.61x = 74,537,899.69
5. Step 5: Solve for x
   x = 74,537,899.69/9,920.61
6. Step 6: Final answer
   x = 7,513.44