Finding the Fourth Proportional to 2,978.89, 4,468.61 and 1,223.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.89 : 4,468.61 = 1,223.49 : x
2. Step 2: Convert to fraction form
   2,978.89/4,468.61 = 1,223.49/x
3. Step 3: Cross multiply
   2,978.89x = 4,468.61 × 1,223.49
4. Step 4: Simplify right side
   2,978.89x = 5,467,299.65
5. Step 5: Solve for x
   x = 5,467,299.65/2,978.89
6. Step 6: Final answer
   x = 1,835.35