Finding the Fourth Proportional to 2,600.91, 3,898.98 and 956.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.91 : 3,898.98 = 956.21 : x
2. Step 2: Convert to fraction form
   2,600.91/3,898.98 = 956.21/x
3. Step 3: Cross multiply
   2,600.91x = 3,898.98 × 956.21
4. Step 4: Simplify right side
   2,600.91x = 3,728,224.17
5. Step 5: Solve for x
   x = 3,728,224.17/2,600.91
6. Step 6: Final answer
   x = 1,433.43