Finding the Fourth Proportional to 2,355.72, 3,251.04 and 1,307.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,355.72 : 3,251.04 = 1,307.78 : x
2. Step 2: Convert to fraction form
   2,355.72/3,251.04 = 1,307.78/x
3. Step 3: Cross multiply
   2,355.72x = 3,251.04 × 1,307.78
4. Step 4: Simplify right side
   2,355.72x = 4,251,645.09
5. Step 5: Solve for x
   x = 4,251,645.09/2,355.72
6. Step 6: Final answer
   x = 1,804.82