Finding the Fourth Proportional to 2,839.32, 4,256.25 and 891.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.32 : 4,256.25 = 891.07 : x
2. Step 2: Convert to fraction form
   2,839.32/4,256.25 = 891.07/x
3. Step 3: Cross multiply
   2,839.32x = 4,256.25 × 891.07
4. Step 4: Simplify right side
   2,839.32x = 3,792,602.71
5. Step 5: Solve for x
   x = 3,792,602.71/2,839.32
6. Step 6: Final answer
   x = 1,335.74