Finding the Fourth Proportional to 2,535.21, 3,802.86 and 891.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,535.21 : 3,802.86 = 891.81 : x
2. Step 2: Convert to fraction form
   2,535.21/3,802.86 = 891.81/x
3. Step 3: Cross multiply
   2,535.21x = 3,802.86 × 891.81
4. Step 4: Simplify right side
   2,535.21x = 3,391,428.58
5. Step 5: Solve for x
   x = 3,391,428.58/2,535.21
6. Step 6: Final answer
   x = 1,337.73