Finding the Fourth Proportional to 10,151.28, 15,219.77 and 3,906.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,151.28 : 15,219.77 = 3,906.05 : x
2. Step 2: Convert to fraction form
   10,151.28/15,219.77 = 3,906.05/x
3. Step 3: Cross multiply
   10,151.28x = 15,219.77 × 3,906.05
4. Step 4: Simplify right side
   10,151.28x = 59,449,086.98
5. Step 5: Solve for x
   x = 59,449,086.98/10,151.28
6. Step 6: Final answer
   x = 5,856.31