Finding the Fourth Proportional to 89,903.72, 134,171.97 and 79,939.46

Step by Step Solution

1. Step 1: Write the proportion equation
   89,903.72 : 134,171.97 = 79,939.46 : x
2. Step 2: Convert to fraction form
   89,903.72/134,171.97 = 79,939.46/x
3. Step 3: Cross multiply
   89,903.72x = 134,171.97 × 79,939.46
4. Step 4: Simplify right side
   89,903.72x = 10,725,634,828.94
5. Step 5: Solve for x
   x = 10,725,634,828.94/89,903.72
6. Step 6: Final answer
   x = 119,301.35