Finding the Fourth Proportional to 1,114.37, 1,671.57 and 985.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.37 : 1,671.57 = 985.89 : x
2. Step 2: Convert to fraction form
   1,114.37/1,671.57 = 985.89/x
3. Step 3: Cross multiply
   1,114.37x = 1,671.57 × 985.89
4. Step 4: Simplify right side
   1,114.37x = 1,647,981.01
5. Step 5: Solve for x
   x = 1,647,981.01/1,114.37
6. Step 6: Final answer
   x = 1,478.84