Finding the Fourth Proportional to 2,156.24, 3,234.72 and 1,335.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.24 : 3,234.72 = 1,335.20 : x
2. Step 2: Convert to fraction form
   2,156.24/3,234.72 = 1,335.20/x
3. Step 3: Cross multiply
   2,156.24x = 3,234.72 × 1,335.20
4. Step 4: Simplify right side
   2,156.24x = 4,318,998.14
5. Step 5: Solve for x
   x = 4,318,998.14/2,156.24
6. Step 6: Final answer
   x = 2,003.02