Finding the Fourth Proportional to 1,912.34, 2,638.91 and 1,061.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.34 : 2,638.91 = 1,061.54 : x
2. Step 2: Convert to fraction form
   1,912.34/2,638.91 = 1,061.54/x
3. Step 3: Cross multiply
   1,912.34x = 2,638.91 × 1,061.54
4. Step 4: Simplify right side
   1,912.34x = 2,801,290.02
5. Step 5: Solve for x
   x = 2,801,290.02/1,912.34
6. Step 6: Final answer
   x = 1,464.85