Finding the Fourth Proportional to 2,150.95, 2,968.58 and 1,311.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.95 : 2,968.58 = 1,311.91 : x
2. Step 2: Convert to fraction form
   2,150.95/2,968.58 = 1,311.91/x
3. Step 3: Cross multiply
   2,150.95x = 2,968.58 × 1,311.91
4. Step 4: Simplify right side
   2,150.95x = 3,894,509.79
5. Step 5: Solve for x
   x = 3,894,509.79/2,150.95
6. Step 6: Final answer
   x = 1,810.60