Finding the Fourth Proportional to 2,890.42, 4,314.24 and 2,820.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,890.42 : 4,314.24 = 2,820.49 : x
2. Step 2: Convert to fraction form
   2,890.42/4,314.24 = 2,820.49/x
3. Step 3: Cross multiply
   2,890.42x = 4,314.24 × 2,820.49
4. Step 4: Simplify right side
   2,890.42x = 12,168,259.99
5. Step 5: Solve for x
   x = 12,168,259.99/2,890.42
6. Step 6: Final answer
   x = 4,209.86