Finding the Fourth Proportional to 139,044.33, 191,866.82 and 85,331.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,044.33 : 191,866.82 = 85,331.61 : x
2. Step 2: Convert to fraction form
   139,044.33/191,866.82 = 85,331.61/x
3. Step 3: Cross multiply
   139,044.33x = 191,866.82 × 85,331.61
4. Step 4: Simplify right side
   139,044.33x = 16,372,304,229.52
5. Step 5: Solve for x
   x = 16,372,304,229.52/139,044.33
6. Step 6: Final answer
   x = 117,748.81