Finding the Fourth Proportional to 8,300.70, 12,435.12 and 5,518.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,300.70 : 12,435.12 = 5,518.98 : x
2. Step 2: Convert to fraction form
   8,300.70/12,435.12 = 5,518.98/x
3. Step 3: Cross multiply
   8,300.70x = 12,435.12 × 5,518.98
4. Step 4: Simplify right side
   8,300.70x = 68,629,178.58
5. Step 5: Solve for x
   x = 68,629,178.58/8,300.70
6. Step 6: Final answer
   x = 8,267.88