Finding the Fourth Proportional to 8,442.72, 12,667.68 and 6,498.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,442.72 : 12,667.68 = 6,498.72 : x
2. Step 2: Convert to fraction form
   8,442.72/12,667.68 = 6,498.72/x
3. Step 3: Cross multiply
   8,442.72x = 12,667.68 × 6,498.72
4. Step 4: Simplify right side
   8,442.72x = 82,323,705.37
5. Step 5: Solve for x
   x = 82,323,705.37/8,442.72
6. Step 6: Final answer
   x = 9,750.85