Finding the Fourth Proportional to 2,367.86, 3,551.07 and 828.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,367.86 : 3,551.07 = 828.50 : x
2. Step 2: Convert to fraction form
   2,367.86/3,551.07 = 828.50/x
3. Step 3: Cross multiply
   2,367.86x = 3,551.07 × 828.50
4. Step 4: Simplify right side
   2,367.86x = 2,942,061.50
5. Step 5: Solve for x
   x = 2,942,061.50/2,367.86
6. Step 6: Final answer
   x = 1,242.50