Finding the Fourth Proportional to 17,504.71, 26,248.42 and 7,639.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,504.71 : 26,248.42 = 7,639.72 : x
2. Step 2: Convert to fraction form
   17,504.71/26,248.42 = 7,639.72/x
3. Step 3: Cross multiply
   17,504.71x = 26,248.42 × 7,639.72
4. Step 4: Simplify right side
   17,504.71x = 200,530,523.17
5. Step 5: Solve for x
   x = 200,530,523.17/17,504.71
6. Step 6: Final answer
   x = 11,455.81