Finding the Fourth Proportional to 2,611.39, 3,915.86 and 967.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.39 : 3,915.86 = 967.90 : x
2. Step 2: Convert to fraction form
   2,611.39/3,915.86 = 967.90/x
3. Step 3: Cross multiply
   2,611.39x = 3,915.86 × 967.90
4. Step 4: Simplify right side
   2,611.39x = 3,790,160.89
5. Step 5: Solve for x
   x = 3,790,160.89/2,611.39
6. Step 6: Final answer
   x = 1,451.40