Finding the Fourth Proportional to 71,665.15, 107,497.78 and 18,357.33

Step by Step Solution

1. Step 1: Write the proportion equation
   71,665.15 : 107,497.78 = 18,357.33 : x
2. Step 2: Convert to fraction form
   71,665.15/107,497.78 = 18,357.33/x
3. Step 3: Cross multiply
   71,665.15x = 107,497.78 × 18,357.33
4. Step 4: Simplify right side
   71,665.15x = 1,973,372,175.83
5. Step 5: Solve for x
   x = 1,973,372,175.83/71,665.15
6. Step 6: Final answer
   x = 27,536.01