Finding the Fourth Proportional to 2,647.42, 3,972.47 and 1,260.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.42 : 3,972.47 = 1,260.50 : x
2. Step 2: Convert to fraction form
   2,647.42/3,972.47 = 1,260.50/x
3. Step 3: Cross multiply
   2,647.42x = 3,972.47 × 1,260.50
4. Step 4: Simplify right side
   2,647.42x = 5,007,281.72
5. Step 5: Solve for x
   x = 5,007,281.72/2,647.42
6. Step 6: Final answer
   x = 1,891.38