Finding the Fourth Proportional to 2,424.39, 3,636.12 and 780.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,424.39 : 3,636.12 = 780.54 : x
2. Step 2: Convert to fraction form
   2,424.39/3,636.12 = 780.54/x
3. Step 3: Cross multiply
   2,424.39x = 3,636.12 × 780.54
4. Step 4: Simplify right side
   2,424.39x = 2,838,137.10
5. Step 5: Solve for x
   x = 2,838,137.10/2,424.39
6. Step 6: Final answer
   x = 1,170.66