Finding the Fourth Proportional to 2,599.25, 3,587.05 and 1,420.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.25 : 3,587.05 = 1,420.40 : x
2. Step 2: Convert to fraction form
   2,599.25/3,587.05 = 1,420.40/x
3. Step 3: Cross multiply
   2,599.25x = 3,587.05 × 1,420.40
4. Step 4: Simplify right side
   2,599.25x = 5,095,038.72
5. Step 5: Solve for x
   x = 5,095,038.72/2,599.25
6. Step 6: Final answer
   x = 1,960.20