Finding the Fourth Proportional to 2,937.38, 4,405.59 and 856.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,937.38 : 4,405.59 = 856.89 : x
2. Step 2: Convert to fraction form
   2,937.38/4,405.59 = 856.89/x
3. Step 3: Cross multiply
   2,937.38x = 4,405.59 × 856.89
4. Step 4: Simplify right side
   2,937.38x = 3,775,106.02
5. Step 5: Solve for x
   x = 3,775,106.02/2,937.38
6. Step 6: Final answer
   x = 1,285.20