Finding the Fourth Proportional to 138,076.74, 206,983.89 and 88,016.31

Step by Step Solution

1. Step 1: Write the proportion equation
   138,076.74 : 206,983.89 = 88,016.31 : x
2. Step 2: Convert to fraction form
   138,076.74/206,983.89 = 88,016.31/x
3. Step 3: Cross multiply
   138,076.74x = 206,983.89 × 88,016.31
4. Step 4: Simplify right side
   138,076.74x = 18,217,958,227.25
5. Step 5: Solve for x
   x = 18,217,958,227.25/138,076.74
6. Step 6: Final answer
   x = 131,940.82