Finding the Fourth Proportional to 2,436.80, 3,362.78 and 1,317.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.80 : 3,362.78 = 1,317.74 : x
2. Step 2: Convert to fraction form
   2,436.80/3,362.78 = 1,317.74/x
3. Step 3: Cross multiply
   2,436.80x = 3,362.78 × 1,317.74
4. Step 4: Simplify right side
   2,436.80x = 4,431,259.46
5. Step 5: Solve for x
   x = 4,431,259.46/2,436.80
6. Step 6: Final answer
   x = 1,818.48