Finding the Fourth Proportional to 3,978.37, 5,489.72 and 2,299.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.37 : 5,489.72 = 2,299.51 : x
2. Step 2: Convert to fraction form
   3,978.37/5,489.72 = 2,299.51/x
3. Step 3: Cross multiply
   3,978.37x = 5,489.72 × 2,299.51
4. Step 4: Simplify right side
   3,978.37x = 12,623,644.34
5. Step 5: Solve for x
   x = 12,623,644.34/3,978.37
6. Step 6: Final answer
   x = 3,173.07