Finding the Fourth Proportional to 1,554.62, 2,143.86 and 994.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.62 : 2,143.86 = 994.89 : x
2. Step 2: Convert to fraction form
   1,554.62/2,143.86 = 994.89/x
3. Step 3: Cross multiply
   1,554.62x = 2,143.86 × 994.89
4. Step 4: Simplify right side
   1,554.62x = 2,132,889.18
5. Step 5: Solve for x
   x = 2,132,889.18/1,554.62
6. Step 6: Final answer
   x = 1,371.97