Finding the Fourth Proportional to 2,599.53, 3,900.78 and 955.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.53 : 3,900.78 = 955.86 : x
2. Step 2: Convert to fraction form
   2,599.53/3,900.78 = 955.86/x
3. Step 3: Cross multiply
   2,599.53x = 3,900.78 × 955.86
4. Step 4: Simplify right side
   2,599.53x = 3,728,599.57
5. Step 5: Solve for x
   x = 3,728,599.57/2,599.53
6. Step 6: Final answer
   x = 1,434.34