Finding the Fourth Proportional to 10,131.28, 13,986.98 and 7,722.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.28 : 13,986.98 = 7,722.34 : x
2. Step 2: Convert to fraction form
   10,131.28/13,986.98 = 7,722.34/x
3. Step 3: Cross multiply
   10,131.28x = 13,986.98 × 7,722.34
4. Step 4: Simplify right side
   10,131.28x = 108,012,170.51
5. Step 5: Solve for x
   x = 108,012,170.51/10,131.28
6. Step 6: Final answer
   x = 10,661.26