Finding the Fourth Proportional to 10,490.94, 15,726.69 and 3,912.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,490.94 : 15,726.69 = 3,912.12 : x
2. Step 2: Convert to fraction form
   10,490.94/15,726.69 = 3,912.12/x
3. Step 3: Cross multiply
   10,490.94x = 15,726.69 × 3,912.12
4. Step 4: Simplify right side
   10,490.94x = 61,524,698.48
5. Step 5: Solve for x
   x = 61,524,698.48/10,490.94
6. Step 6: Final answer
   x = 5,864.56