Finding the Fourth Proportional to 17,688.29, 26,536.89 and 5,208.71

Step by Step Solution

1. Step 1: Write the proportion equation
   17,688.29 : 26,536.89 = 5,208.71 : x
2. Step 2: Convert to fraction form
   17,688.29/26,536.89 = 5,208.71/x
3. Step 3: Cross multiply
   17,688.29x = 26,536.89 × 5,208.71
4. Step 4: Simplify right side
   17,688.29x = 138,222,831.63
5. Step 5: Solve for x
   x = 138,222,831.63/17,688.29
6. Step 6: Final answer
   x = 7,814.37