Finding the Fourth Proportional to 1,391.41, 1,919.60 and 893.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.41 : 1,919.60 = 893.98 : x
2. Step 2: Convert to fraction form
   1,391.41/1,919.60 = 893.98/x
3. Step 3: Cross multiply
   1,391.41x = 1,919.60 × 893.98
4. Step 4: Simplify right side
   1,391.41x = 1,716,084.01
5. Step 5: Solve for x
   x = 1,716,084.01/1,391.41
6. Step 6: Final answer
   x = 1,233.34