Finding the Fourth Proportional to 12,002.11, 17,978.56 and 8,041.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,002.11 : 17,978.56 = 8,041.21 : x
2. Step 2: Convert to fraction form
   12,002.11/17,978.56 = 8,041.21/x
3. Step 3: Cross multiply
   12,002.11x = 17,978.56 × 8,041.21
4. Step 4: Simplify right side
   12,002.11x = 144,569,311.41
5. Step 5: Solve for x
   x = 144,569,311.41/12,002.11
6. Step 6: Final answer
   x = 12,045.33