Finding the Fourth Proportional to 2,885.25, 4,321.76 and 2,784.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,885.25 : 4,321.76 = 2,784.21 : x
2. Step 2: Convert to fraction form
   2,885.25/4,321.76 = 2,784.21/x
3. Step 3: Cross multiply
   2,885.25x = 4,321.76 × 2,784.21
4. Step 4: Simplify right side
   2,885.25x = 12,032,673.49
5. Step 5: Solve for x
   x = 12,032,673.49/2,885.25
6. Step 6: Final answer
   x = 4,170.41