Finding the Fourth Proportional to 8,657.78, 12,993.72 and 4,499.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,657.78 : 12,993.72 = 4,499.06 : x
2. Step 2: Convert to fraction form
   8,657.78/12,993.72 = 4,499.06/x
3. Step 3: Cross multiply
   8,657.78x = 12,993.72 × 4,499.06
4. Step 4: Simplify right side
   8,657.78x = 58,459,525.90
5. Step 5: Solve for x
   x = 58,459,525.90/8,657.78
6. Step 6: Final answer
   x = 6,752.25