Finding the Fourth Proportional to 10,696.51, 16,140.42 and 10,291.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,696.51 : 16,140.42 = 10,291.51 : x
2. Step 2: Convert to fraction form
   10,696.51/16,140.42 = 10,291.51/x
3. Step 3: Cross multiply
   10,696.51x = 16,140.42 × 10,291.51
4. Step 4: Simplify right side
   10,696.51x = 166,109,293.83
5. Step 5: Solve for x
   x = 166,109,293.83/10,696.51
6. Step 6: Final answer
   x = 15,529.30