Finding the Fourth Proportional to 2,389.86, 3,573.78 and 2,273.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.86 : 3,573.78 = 2,273.22 : x
2. Step 2: Convert to fraction form
   2,389.86/3,573.78 = 2,273.22/x
3. Step 3: Cross multiply
   2,389.86x = 3,573.78 × 2,273.22
4. Step 4: Simplify right side
   2,389.86x = 8,123,988.17
5. Step 5: Solve for x
   x = 8,123,988.17/2,389.86
6. Step 6: Final answer
   x = 3,399.36