Finding the Fourth Proportional to 89,173.92, 123,072.72 and 55,193.34

Step by Step Solution

1. Step 1: Write the proportion equation
   89,173.92 : 123,072.72 = 55,193.34 : x
2. Step 2: Convert to fraction form
   89,173.92/123,072.72 = 55,193.34/x
3. Step 3: Cross multiply
   89,173.92x = 123,072.72 × 55,193.34
4. Step 4: Simplify right side
   89,173.92x = 6,792,794,479.68
5. Step 5: Solve for x
   x = 6,792,794,479.68/89,173.92
6. Step 6: Final answer
   x = 76,174.68