Finding the Fourth Proportional to 17,561.11, 26,341.69 and 7,172.86

Step by Step Solution

1. Step 1: Write the proportion equation
   17,561.11 : 26,341.69 = 7,172.86 : x
2. Step 2: Convert to fraction form
   17,561.11/26,341.69 = 7,172.86/x
3. Step 3: Cross multiply
   17,561.11x = 26,341.69 × 7,172.86
4. Step 4: Simplify right side
   17,561.11x = 188,945,233.59
5. Step 5: Solve for x
   x = 188,945,233.59/17,561.11
6. Step 6: Final answer
   x = 10,759.30