Finding the Fourth Proportional to 9,920.03, 13,690.91 and 5,727.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.03 : 13,690.91 = 5,727.47 : x
2. Step 2: Convert to fraction form
   9,920.03/13,690.91 = 5,727.47/x
3. Step 3: Cross multiply
   9,920.03x = 13,690.91 × 5,727.47
4. Step 4: Simplify right side
   9,920.03x = 78,414,247.66
5. Step 5: Solve for x
   x = 78,414,247.66/9,920.03
6. Step 6: Final answer
   x = 7,904.64