Finding the Fourth Proportional to 8,782.54, 12,118.71 and 5,245

Step by Step Solution

1. Step 1: Write the proportion equation
   8,782.54 : 12,118.71 = 5,245 : x
2. Step 2: Convert to fraction form
   8,782.54/12,118.71 = 5,245/x
3. Step 3: Cross multiply
   8,782.54x = 12,118.71 × 5,245
4. Step 4: Simplify right side
   8,782.54x = 63,562,633.95
5. Step 5: Solve for x
   x = 63,562,633.95/8,782.54
6. Step 6: Final answer
   x = 7,237.39