Finding the Fourth Proportional to 12,647.83, 18,961.03 and 5,247.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,647.83 : 18,961.03 = 5,247.67 : x
2. Step 2: Convert to fraction form
   12,647.83/18,961.03 = 5,247.67/x
3. Step 3: Cross multiply
   12,647.83x = 18,961.03 × 5,247.67
4. Step 4: Simplify right side
   12,647.83x = 99,501,228.30
5. Step 5: Solve for x
   x = 99,501,228.30/12,647.83
6. Step 6: Final answer
   x = 7,867.06