Finding the Fourth Proportional to 11,716.72, 17,555.24 and 7,090

Step by Step Solution

1. Step 1: Write the proportion equation
   11,716.72 : 17,555.24 = 7,090 : x
2. Step 2: Convert to fraction form
   11,716.72/17,555.24 = 7,090/x
3. Step 3: Cross multiply
   11,716.72x = 17,555.24 × 7,090
4. Step 4: Simplify right side
   11,716.72x = 124,466,651.60
5. Step 5: Solve for x
   x = 124,466,651.60/11,716.72
6. Step 6: Final answer
   x = 10,622.99