Finding the Fourth Proportional to 2,897.37, 4,321.35 and 2,821.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,897.37 : 4,321.35 = 2,821.23 : x
2. Step 2: Convert to fraction form
   2,897.37/4,321.35 = 2,821.23/x
3. Step 3: Cross multiply
   2,897.37x = 4,321.35 × 2,821.23
4. Step 4: Simplify right side
   2,897.37x = 12,191,522.26
5. Step 5: Solve for x
   x = 12,191,522.26/2,897.37
6. Step 6: Final answer
   x = 4,207.79