Finding the Fourth Proportional to 10,196.72, 15,270.38 and 5,185.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,196.72 : 15,270.38 = 5,185.91 : x
2. Step 2: Convert to fraction form
   10,196.72/15,270.38 = 5,185.91/x
3. Step 3: Cross multiply
   10,196.72x = 15,270.38 × 5,185.91
4. Step 4: Simplify right side
   10,196.72x = 79,190,816.35
5. Step 5: Solve for x
   x = 79,190,816.35/10,196.72
6. Step 6: Final answer
   x = 7,766.30