Finding the Fourth Proportional to 11,426.69, 17,142.18 and 5,187.14

Step by Step Solution

1. Step 1: Write the proportion equation
   11,426.69 : 17,142.18 = 5,187.14 : x
2. Step 2: Convert to fraction form
   11,426.69/17,142.18 = 5,187.14/x
3. Step 3: Cross multiply
   11,426.69x = 17,142.18 × 5,187.14
4. Step 4: Simplify right side
   11,426.69x = 88,918,908.00
5. Step 5: Solve for x
   x = 88,918,908.00/11,426.69
6. Step 6: Final answer
   x = 7,781.68