Finding the Fourth Proportional to 12,185.83, 18,281.93 and 4,288.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.83 : 18,281.93 = 4,288.02 : x
2. Step 2: Convert to fraction form
   12,185.83/18,281.93 = 4,288.02/x
3. Step 3: Cross multiply
   12,185.83x = 18,281.93 × 4,288.02
4. Step 4: Simplify right side
   12,185.83x = 78,393,281.48
5. Step 5: Solve for x
   x = 78,393,281.48/12,185.83
6. Step 6: Final answer
   x = 6,433.15