Finding the Fourth Proportional to 2,599.49, 3,587.28 and 1,420.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.49 : 3,587.28 = 1,420.55 : x
2. Step 2: Convert to fraction form
   2,599.49/3,587.28 = 1,420.55/x
3. Step 3: Cross multiply
   2,599.49x = 3,587.28 × 1,420.55
4. Step 4: Simplify right side
   2,599.49x = 5,095,910.60
5. Step 5: Solve for x
   x = 5,095,910.60/2,599.49
6. Step 6: Final answer
   x = 1,960.35