Finding the Fourth Proportional to 1,389.27, 2,084.38 and 994.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.27 : 2,084.38 = 994.34 : x
2. Step 2: Convert to fraction form
   1,389.27/2,084.38 = 994.34/x
3. Step 3: Cross multiply
   1,389.27x = 2,084.38 × 994.34
4. Step 4: Simplify right side
   1,389.27x = 2,072,590.73
5. Step 5: Solve for x
   x = 2,072,590.73/1,389.27
6. Step 6: Final answer
   x = 1,491.86