Finding the Fourth Proportional to 2,785.17, 4,178.91 and 1,303.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.17 : 4,178.91 = 1,303.31 : x
2. Step 2: Convert to fraction form
   2,785.17/4,178.91 = 1,303.31/x
3. Step 3: Cross multiply
   2,785.17x = 4,178.91 × 1,303.31
4. Step 4: Simplify right side
   2,785.17x = 5,446,399.69
5. Step 5: Solve for x
   x = 5,446,399.69/2,785.17
6. Step 6: Final answer
   x = 1,955.50