Finding the Fourth Proportional to 10,105.17, 15,158.97 and 5,173.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105.17 : 15,158.97 = 5,173.49 : x
2. Step 2: Convert to fraction form
   10,105.17/15,158.97 = 5,173.49/x
3. Step 3: Cross multiply
   10,105.17x = 15,158.97 × 5,173.49
4. Step 4: Simplify right side
   10,105.17x = 78,424,703.91
5. Step 5: Solve for x
   x = 78,424,703.91/10,105.17
6. Step 6: Final answer
   x = 7,760.85