Finding the Fourth Proportional to 12,003.68, 18,007.32 and 4,211.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,003.68 : 18,007.32 = 4,211.12 : x
2. Step 2: Convert to fraction form
   12,003.68/18,007.32 = 4,211.12/x
3. Step 3: Cross multiply
   12,003.68x = 18,007.32 × 4,211.12
4. Step 4: Simplify right side
   12,003.68x = 75,830,985.40
5. Step 5: Solve for x
   x = 75,830,985.40/12,003.68
6. Step 6: Final answer
   x = 6,317.31