Finding the Fourth Proportional to 12,464.21, 17,196.30 and 7,990.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,464.21 : 17,196.30 = 7,990.43 : x
2. Step 2: Convert to fraction form
   12,464.21/17,196.30 = 7,990.43/x
3. Step 3: Cross multiply
   12,464.21x = 17,196.30 × 7,990.43
4. Step 4: Simplify right side
   12,464.21x = 137,405,874.40
5. Step 5: Solve for x
   x = 137,405,874.40/12,464.21
6. Step 6: Final answer
   x = 11,024.03