Finding the Fourth Proportional to 2,460.38, 3,688.74 and 815.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,460.38 : 3,688.74 = 815.94 : x
2. Step 2: Convert to fraction form
   2,460.38/3,688.74 = 815.94/x
3. Step 3: Cross multiply
   2,460.38x = 3,688.74 × 815.94
4. Step 4: Simplify right side
   2,460.38x = 3,009,790.52
5. Step 5: Solve for x
   x = 3,009,790.52/2,460.38
6. Step 6: Final answer
   x = 1,223.31