Finding the Fourth Proportional to 2,936.69, 4,405.47 and 856.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,936.69 : 4,405.47 = 856.42 : x
2. Step 2: Convert to fraction form
   2,936.69/4,405.47 = 856.42/x
3. Step 3: Cross multiply
   2,936.69x = 4,405.47 × 856.42
4. Step 4: Simplify right side
   2,936.69x = 3,772,947.99
5. Step 5: Solve for x
   x = 3,772,947.99/2,936.69
6. Step 6: Final answer
   x = 1,284.76