Finding the Fourth Proportional to 1,554.98, 2,145.31 and 891.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.98 : 2,145.31 = 891.34 : x
2. Step 2: Convert to fraction form
   1,554.98/2,145.31 = 891.34/x
3. Step 3: Cross multiply
   1,554.98x = 2,145.31 × 891.34
4. Step 4: Simplify right side
   1,554.98x = 1,912,193.02
5. Step 5: Solve for x
   x = 1,912,193.02/1,554.98
6. Step 6: Final answer
   x = 1,229.73