Finding the Fourth Proportional to 117,680.38, 162,490.56 and 72,379.41

Step by Step Solution

1. Step 1: Write the proportion equation
   117,680.38 : 162,490.56 = 72,379.41 : x
2. Step 2: Convert to fraction form
   117,680.38/162,490.56 = 72,379.41/x
3. Step 3: Cross multiply
   117,680.38x = 162,490.56 × 72,379.41
4. Step 4: Simplify right side
   117,680.38x = 11,760,969,982.61
5. Step 5: Solve for x
   x = 11,760,969,982.61/117,680.38
6. Step 6: Final answer
   x = 99,939.94