Finding the Fourth Proportional to 4,978.53, 6,871.03 and 3,215.30

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.53 : 6,871.03 = 3,215.30 : x
2. Step 2: Convert to fraction form
   4,978.53/6,871.03 = 3,215.30/x
3. Step 3: Cross multiply
   4,978.53x = 6,871.03 × 3,215.30
4. Step 4: Simplify right side
   4,978.53x = 22,092,380.37
5. Step 5: Solve for x
   x = 22,092,380.37/4,978.53
6. Step 6: Final answer
   x = 4,437.53