Finding the Fourth Proportional to 2,599.38, 3,587.20 and 1,420.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.38 : 3,587.20 = 1,420.56 : x
2. Step 2: Convert to fraction form
   2,599.38/3,587.20 = 1,420.56/x
3. Step 3: Cross multiply
   2,599.38x = 3,587.20 × 1,420.56
4. Step 4: Simplify right side
   2,599.38x = 5,095,832.83
5. Step 5: Solve for x
   x = 5,095,832.83/2,599.38
6. Step 6: Final answer
   x = 1,960.40