Finding the Fourth Proportional to 1,089.18, 1,504.71 and 994.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.18 : 1,504.71 = 994.14 : x
2. Step 2: Convert to fraction form
   1,089.18/1,504.71 = 994.14/x
3. Step 3: Cross multiply
   1,089.18x = 1,504.71 × 994.14
4. Step 4: Simplify right side
   1,089.18x = 1,495,892.40
5. Step 5: Solve for x
   x = 1,495,892.40/1,089.18
6. Step 6: Final answer
   x = 1,373.41