Finding the Fourth Proportional to 1,391.46, 1,919.34 and 893.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.46 : 1,919.34 = 893.58 : x
2. Step 2: Convert to fraction form
   1,391.46/1,919.34 = 893.58/x
3. Step 3: Cross multiply
   1,391.46x = 1,919.34 × 893.58
4. Step 4: Simplify right side
   1,391.46x = 1,715,083.84
5. Step 5: Solve for x
   x = 1,715,083.84/1,391.46
6. Step 6: Final answer
   x = 1,232.58