Finding the Fourth Proportional to 2,602.87, 3,904.20 and 959.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602.87 : 3,904.20 = 959.31 : x
2. Step 2: Convert to fraction form
   2,602.87/3,904.20 = 959.31/x
3. Step 3: Cross multiply
   2,602.87x = 3,904.20 × 959.31
4. Step 4: Simplify right side
   2,602.87x = 3,745,338.10
5. Step 5: Solve for x
   x = 3,745,338.10/2,602.87
6. Step 6: Final answer
   x = 1,438.93