Finding the Fourth Proportional to 12,012.42, 18,026.83 and 4,221.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,012.42 : 18,026.83 = 4,221.23 : x
2. Step 2: Convert to fraction form
   12,012.42/18,026.83 = 4,221.23/x
3. Step 3: Cross multiply
   12,012.42x = 18,026.83 × 4,221.23
4. Step 4: Simplify right side
   12,012.42x = 76,095,284.36
5. Step 5: Solve for x
   x = 76,095,284.36/12,012.42
6. Step 6: Final answer
   x = 6,334.72