Finding the Fourth Proportional to 12,128.60, 18,188.04 and 4,333.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.60 : 18,188.04 = 4,333.16 : x
2. Step 2: Convert to fraction form
   12,128.60/18,188.04 = 4,333.16/x
3. Step 3: Cross multiply
   12,128.60x = 18,188.04 × 4,333.16
4. Step 4: Simplify right side
   12,128.60x = 78,811,687.41
5. Step 5: Solve for x
   x = 78,811,687.41/12,128.60
6. Step 6: Final answer
   x = 6,498.00