Finding the Fourth Proportional to 1,554.24, 2,144.82 and 891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.24 : 2,144.82 = 891.50 : x
2. Step 2: Convert to fraction form
   1,554.24/2,144.82 = 891.50/x
3. Step 3: Cross multiply
   1,554.24x = 2,144.82 × 891.50
4. Step 4: Simplify right side
   1,554.24x = 1,912,096.31
5. Step 5: Solve for x
   x = 1,912,096.31/1,554.24
6. Step 6: Final answer
   x = 1,230.25