Finding the Fourth Proportional to 10,203.76, 15,281.34 and 7,086.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,203.76 : 15,281.34 = 7,086.88 : x
2. Step 2: Convert to fraction form
   10,203.76/15,281.34 = 7,086.88/x
3. Step 3: Cross multiply
   10,203.76x = 15,281.34 × 7,086.88
4. Step 4: Simplify right side
   10,203.76x = 108,297,022.82
5. Step 5: Solve for x
   x = 108,297,022.82/10,203.76
6. Step 6: Final answer
   x = 10,613.44