Finding the Fourth Proportional to 17,196.70, 25,790.72 and 6,663.11

Step by Step Solution

1. Step 1: Write the proportion equation
   17,196.70 : 25,790.72 = 6,663.11 : x
2. Step 2: Convert to fraction form
   17,196.70/25,790.72 = 6,663.11/x
3. Step 3: Cross multiply
   17,196.70x = 25,790.72 × 6,663.11
4. Step 4: Simplify right side
   17,196.70x = 171,846,275.39
5. Step 5: Solve for x
   x = 171,846,275.39/17,196.70
6. Step 6: Final answer
   x = 9,992.98