Finding the Fourth Proportional to 5,159.28, 7,111.56 and 3,950.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,159.28 : 7,111.56 = 3,950.76 : x
2. Step 2: Convert to fraction form
   5,159.28/7,111.56 = 3,950.76/x
3. Step 3: Cross multiply
   5,159.28x = 7,111.56 × 3,950.76
4. Step 4: Simplify right side
   5,159.28x = 28,096,066.79
5. Step 5: Solve for x
   x = 28,096,066.79/5,159.28
6. Step 6: Final answer
   x = 5,445.73