Finding the Fourth Proportional to 2,611.72, 3,919.12 and 969.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.72 : 3,919.12 = 969.42 : x
2. Step 2: Convert to fraction form
   2,611.72/3,919.12 = 969.42/x
3. Step 3: Cross multiply
   2,611.72x = 3,919.12 × 969.42
4. Step 4: Simplify right side
   2,611.72x = 3,799,273.31
5. Step 5: Solve for x
   x = 3,799,273.31/2,611.72
6. Step 6: Final answer
   x = 1,454.70