Finding the Fourth Proportional to 9,940.16, 13,717.33 and 5,402.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,940.16 : 13,717.33 = 5,402.79 : x
2. Step 2: Convert to fraction form
   9,940.16/13,717.33 = 5,402.79/x
3. Step 3: Cross multiply
   9,940.16x = 13,717.33 × 5,402.79
4. Step 4: Simplify right side
   9,940.16x = 74,111,853.35
5. Step 5: Solve for x
   x = 74,111,853.35/9,940.16
6. Step 6: Final answer
   x = 7,455.80