Finding the Fourth Proportional to 3,978.01, 5,489.90 and 2,299.73

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.01 : 5,489.90 = 2,299.73 : x
2. Step 2: Convert to fraction form
   3,978.01/5,489.90 = 2,299.73/x
3. Step 3: Cross multiply
   3,978.01x = 5,489.90 × 2,299.73
4. Step 4: Simplify right side
   3,978.01x = 12,625,287.73
5. Step 5: Solve for x
   x = 12,625,287.73/3,978.01
6. Step 6: Final answer
   x = 3,173.77