Finding the Fourth Proportional to 2,599.92, 3,587.80 and 1,421.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.92 : 3,587.80 = 1,421.04 : x
2. Step 2: Convert to fraction form
   2,599.92/3,587.80 = 1,421.04/x
3. Step 3: Cross multiply
   2,599.92x = 3,587.80 × 1,421.04
4. Step 4: Simplify right side
   2,599.92x = 5,098,407.31
5. Step 5: Solve for x
   x = 5,098,407.31/2,599.92
6. Step 6: Final answer
   x = 1,960.99