Finding the Fourth Proportional to 3,945.60, 5,922.54 and 2,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.60 : 5,922.54 = 2,389.50 : x
2. Step 2: Convert to fraction form
   3,945.60/5,922.54 = 2,389.50/x
3. Step 3: Cross multiply
   3,945.60x = 5,922.54 × 2,389.50
4. Step 4: Simplify right side
   3,945.60x = 14,151,909.33
5. Step 5: Solve for x
   x = 14,151,909.33/3,945.60
6. Step 6: Final answer
   x = 3,586.76