Finding the Fourth Proportional to 1,554.72, 2,145.62 and 873.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.72 : 2,145.62 = 873.42 : x
2. Step 2: Convert to fraction form
   1,554.72/2,145.62 = 873.42/x
3. Step 3: Cross multiply
   1,554.72x = 2,145.62 × 873.42
4. Step 4: Simplify right side
   1,554.72x = 1,874,027.42
5. Step 5: Solve for x
   x = 1,874,027.42/1,554.72
6. Step 6: Final answer
   x = 1,205.38