Finding the Fourth Proportional to 2,989.55, 4,486.35 and 1,142.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,989.55 : 4,486.35 = 1,142.21 : x
2. Step 2: Convert to fraction form
   2,989.55/4,486.35 = 1,142.21/x
3. Step 3: Cross multiply
   2,989.55x = 4,486.35 × 1,142.21
4. Step 4: Simplify right side
   2,989.55x = 5,124,353.83
5. Step 5: Solve for x
   x = 5,124,353.83/2,989.55
6. Step 6: Final answer
   x = 1,714.09