Finding the Fourth Proportional to 3,933.72, 5,901.45 and 2,181.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,933.72 : 5,901.45 = 2,181.30 : x
2. Step 2: Convert to fraction form
   3,933.72/5,901.45 = 2,181.30/x
3. Step 3: Cross multiply
   3,933.72x = 5,901.45 × 2,181.30
4. Step 4: Simplify right side
   3,933.72x = 12,872,832.89
5. Step 5: Solve for x
   x = 12,872,832.89/3,933.72
6. Step 6: Final answer
   x = 3,272.43