Finding the Fourth Proportional to 151,144.70, 208,608.55 and 100,067.31

Step by Step Solution

1. Step 1: Write the proportion equation
   151,144.70 : 208,608.55 = 100,067.31 : x
2. Step 2: Convert to fraction form
   151,144.70/208,608.55 = 100,067.31/x
3. Step 3: Cross multiply
   151,144.70x = 208,608.55 × 100,067.31
4. Step 4: Simplify right side
   151,144.70x = 20,874,896,191.33
5. Step 5: Solve for x
   x = 20,874,896,191.33/151,144.70
6. Step 6: Final answer
   x = 138,112.00