Finding the Fourth Proportional to 12,079.46, 18,129.60 and 8,384.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,079.46 : 18,129.60 = 8,384.28 : x
2. Step 2: Convert to fraction form
   12,079.46/18,129.60 = 8,384.28/x
3. Step 3: Cross multiply
   12,079.46x = 18,129.60 × 8,384.28
4. Step 4: Simplify right side
   12,079.46x = 152,003,642.69
5. Step 5: Solve for x
   x = 152,003,642.69/12,079.46
6. Step 6: Final answer
   x = 12,583.65