Finding the Fourth Proportional to 9,940.07, 13,717.55 and 5,690.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,940.07 : 13,717.55 = 5,690.75 : x
2. Step 2: Convert to fraction form
   9,940.07/13,717.55 = 5,690.75/x
3. Step 3: Cross multiply
   9,940.07x = 13,717.55 × 5,690.75
4. Step 4: Simplify right side
   9,940.07x = 78,063,093.30
5. Step 5: Solve for x
   x = 78,063,093.30/9,940.07
6. Step 6: Final answer
   x = 7,853.37