Finding the Fourth Proportional to 10,131.50, 15,199.79 and 7,175.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.50 : 15,199.79 = 7,175.75 : x
2. Step 2: Convert to fraction form
   10,131.50/15,199.79 = 7,175.75/x
3. Step 3: Cross multiply
   10,131.50x = 15,199.79 × 7,175.75
4. Step 4: Simplify right side
   10,131.50x = 109,069,781.21
5. Step 5: Solve for x
   x = 109,069,781.21/10,131.50
6. Step 6: Final answer
   x = 10,765.42