Finding the Fourth Proportional to 2,839.56, 4,259.32 and 891.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.56 : 4,259.32 = 891.91 : x
2. Step 2: Convert to fraction form
   2,839.56/4,259.32 = 891.91/x
3. Step 3: Cross multiply
   2,839.56x = 4,259.32 × 891.91
4. Step 4: Simplify right side
   2,839.56x = 3,798,930.10
5. Step 5: Solve for x
   x = 3,798,930.10/2,839.56
6. Step 6: Final answer
   x = 1,337.86