Finding the Fourth Proportional to 2,111.79, 3,167.40 and 650.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.79 : 3,167.40 = 650.91 : x
2. Step 2: Convert to fraction form
   2,111.79/3,167.40 = 650.91/x
3. Step 3: Cross multiply
   2,111.79x = 3,167.40 × 650.91
4. Step 4: Simplify right side
   2,111.79x = 2,061,692.33
5. Step 5: Solve for x
   x = 2,061,692.33/2,111.79
6. Step 6: Final answer
   x = 976.28