Finding the Fourth Proportional to 2,599.72, 3,900.12 and 956.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.72 : 3,900.12 = 956.20 : x
2. Step 2: Convert to fraction form
   2,599.72/3,900.12 = 956.20/x
3. Step 3: Cross multiply
   2,599.72x = 3,900.12 × 956.20
4. Step 4: Simplify right side
   2,599.72x = 3,729,294.74
5. Step 5: Solve for x
   x = 3,729,294.74/2,599.72
6. Step 6: Final answer
   x = 1,434.50