Finding the Fourth Proportional to 2,647.52, 3,972.31 and 1,185.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.52 : 3,972.31 = 1,185.64 : x
2. Step 2: Convert to fraction form
   2,647.52/3,972.31 = 1,185.64/x
3. Step 3: Cross multiply
   2,647.52x = 3,972.31 × 1,185.64
4. Step 4: Simplify right side
   2,647.52x = 4,709,716.73
5. Step 5: Solve for x
   x = 4,709,716.73/2,647.52
6. Step 6: Final answer
   x = 1,778.92