Finding the Fourth Proportional to 10,105.67, 15,159.72 and 5,173.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105.67 : 15,159.72 = 5,173.99 : x
2. Step 2: Convert to fraction form
   10,105.67/15,159.72 = 5,173.99/x
3. Step 3: Cross multiply
   10,105.67x = 15,159.72 × 5,173.99
4. Step 4: Simplify right side
   10,105.67x = 78,436,239.68
5. Step 5: Solve for x
   x = 78,436,239.68/10,105.67
6. Step 6: Final answer
   x = 7,761.61