Finding the Fourth Proportional to 3,151.05, 4,726.81 and 1,071.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,151.05 : 4,726.81 = 1,071.28 : x
2. Step 2: Convert to fraction form
   3,151.05/4,726.81 = 1,071.28/x
3. Step 3: Cross multiply
   3,151.05x = 4,726.81 × 1,071.28
4. Step 4: Simplify right side
   3,151.05x = 5,063,711.65
5. Step 5: Solve for x
   x = 5,063,711.65/3,151.05
6. Step 6: Final answer
   x = 1,606.99