Finding the Fourth Proportional to 8,320.98, 12,472.59 and 4,152.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.98 : 12,472.59 = 4,152.78 : x
2. Step 2: Convert to fraction form
   8,320.98/12,472.59 = 4,152.78/x
3. Step 3: Cross multiply
   8,320.98x = 12,472.59 × 4,152.78
4. Step 4: Simplify right side
   8,320.98x = 51,795,922.30
5. Step 5: Solve for x
   x = 51,795,922.30/8,320.98
6. Step 6: Final answer
   x = 6,224.74