Finding the Fourth Proportional to 12,099, 18,138.69 and 4,303.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099 : 18,138.69 = 4,303.56 : x
2. Step 2: Convert to fraction form
   12,099/18,138.69 = 4,303.56/x
3. Step 3: Cross multiply
   12,099x = 18,138.69 × 4,303.56
4. Step 4: Simplify right side
   12,099x = 78,060,940.74
5. Step 5: Solve for x
   x = 78,060,940.74/12,099
6. Step 6: Final answer
   x = 6,451.85