Finding the Fourth Proportional to 12,128.73, 18,188.23 and 4,333.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.73 : 18,188.23 = 4,333.29 : x
2. Step 2: Convert to fraction form
   12,128.73/18,188.23 = 4,333.29/x
3. Step 3: Cross multiply
   12,128.73x = 18,188.23 × 4,333.29
4. Step 4: Simplify right side
   12,128.73x = 78,814,875.18
5. Step 5: Solve for x
   x = 78,814,875.18/12,128.73
6. Step 6: Final answer
   x = 6,498.20