Finding the Fourth Proportional to 17,621.72, 26,426.42 and 7,089

Step by Step Solution

1. Step 1: Write the proportion equation
   17,621.72 : 26,426.42 = 7,089 : x
2. Step 2: Convert to fraction form
   17,621.72/26,426.42 = 7,089/x
3. Step 3: Cross multiply
   17,621.72x = 26,426.42 × 7,089
4. Step 4: Simplify right side
   17,621.72x = 187,336,891.38
5. Step 5: Solve for x
   x = 187,336,891.38/17,621.72
6. Step 6: Final answer
   x = 10,631.02