Finding the Fourth Proportional to 9,913.11, 13,680.06 and 5,722.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,913.11 : 13,680.06 = 5,722.17 : x
2. Step 2: Convert to fraction form
   9,913.11/13,680.06 = 5,722.17/x
3. Step 3: Cross multiply
   9,913.11x = 13,680.06 × 5,722.17
4. Step 4: Simplify right side
   9,913.11x = 78,279,628.93
5. Step 5: Solve for x
   x = 78,279,628.93/9,913.11
6. Step 6: Final answer
   x = 7,896.58