Finding the Fourth Proportional to 2,240.58, 3,361.69 and 780.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.58 : 3,361.69 = 780.15 : x
2. Step 2: Convert to fraction form
   2,240.58/3,361.69 = 780.15/x
3. Step 3: Cross multiply
   2,240.58x = 3,361.69 × 780.15
4. Step 4: Simplify right side
   2,240.58x = 2,622,622.45
5. Step 5: Solve for x
   x = 2,622,622.45/2,240.58
6. Step 6: Final answer
   x = 1,170.51