Finding the Fourth Proportional to 2,317.34, 3,477.83 and 856.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,317.34 : 3,477.83 = 856.91 : x
2. Step 2: Convert to fraction form
   2,317.34/3,477.83 = 856.91/x
3. Step 3: Cross multiply
   2,317.34x = 3,477.83 × 856.91
4. Step 4: Simplify right side
   2,317.34x = 2,980,187.31
5. Step 5: Solve for x
   x = 2,980,187.31/2,317.34
6. Step 6: Final answer
   x = 1,286.04