Finding the Fourth Proportional to 3,557.02, 5,335.59 and 959.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,557.02 : 5,335.59 = 959.98 : x
2. Step 2: Convert to fraction form
   3,557.02/5,335.59 = 959.98/x
3. Step 3: Cross multiply
   3,557.02x = 5,335.59 × 959.98
4. Step 4: Simplify right side
   3,557.02x = 5,122,059.69
5. Step 5: Solve for x
   x = 5,122,059.69/3,557.02
6. Step 6: Final answer
   x = 1,439.99