Finding the Fourth Proportional to 15,776.25, 21,771.54 and 10,196.97

Step by Step Solution

1. Step 1: Write the proportion equation
   15,776.25 : 21,771.54 = 10,196.97 : x
2. Step 2: Convert to fraction form
   15,776.25/21,771.54 = 10,196.97/x
3. Step 3: Cross multiply
   15,776.25x = 21,771.54 × 10,196.97
4. Step 4: Simplify right side
   15,776.25x = 222,003,740.23
5. Step 5: Solve for x
   x = 222,003,740.23/15,776.25
6. Step 6: Final answer
   x = 14,072.02