Finding the Fourth Proportional to 12,404.40, 17,117.88 and 6,815.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.40 : 17,117.88 = 6,815.28 : x
2. Step 2: Convert to fraction form
   12,404.40/17,117.88 = 6,815.28/x
3. Step 3: Cross multiply
   12,404.40x = 17,117.88 × 6,815.28
4. Step 4: Simplify right side
   12,404.40x = 116,663,145.21
5. Step 5: Solve for x
   x = 116,663,145.21/12,404.40
6. Step 6: Final answer
   x = 9,404.98