Finding the Fourth Proportional to 1,355.21, 2,035.89 and 893.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.21 : 2,035.89 = 893.89 : x
2. Step 2: Convert to fraction form
   1,355.21/2,035.89 = 893.89/x
3. Step 3: Cross multiply
   1,355.21x = 2,035.89 × 893.89
4. Step 4: Simplify right side
   1,355.21x = 1,819,856.62
5. Step 5: Solve for x
   x = 1,819,856.62/1,355.21
6. Step 6: Final answer
   x = 1,342.86