Finding the Fourth Proportional to 2,459.37, 3,688.50 and 815.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.37 : 3,688.50 = 815.49 : x
2. Step 2: Convert to fraction form
   2,459.37/3,688.50 = 815.49/x
3. Step 3: Cross multiply
   2,459.37x = 3,688.50 × 815.49
4. Step 4: Simplify right side
   2,459.37x = 3,007,934.87
5. Step 5: Solve for x
   x = 3,007,934.87/2,459.37
6. Step 6: Final answer
   x = 1,223.05