Finding the Fourth Proportional to 2,937.89, 4,406.15 and 857.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,937.89 : 4,406.15 = 857.46 : x
2. Step 2: Convert to fraction form
   2,937.89/4,406.15 = 857.46/x
3. Step 3: Cross multiply
   2,937.89x = 4,406.15 × 857.46
4. Step 4: Simplify right side
   2,937.89x = 3,778,083.00
5. Step 5: Solve for x
   x = 3,778,083.00/2,937.89
6. Step 6: Final answer
   x = 1,285.98