Finding the Fourth Proportional to 89,173.98, 123,072.66 and 55,193.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,173.98 : 123,072.66 = 55,193.31 : x
2. Step 2: Convert to fraction form
   89,173.98/123,072.66 = 55,193.31/x
3. Step 3: Cross multiply
   89,173.98x = 123,072.66 × 55,193.31
4. Step 4: Simplify right side
   89,173.98x = 6,792,787,475.90
5. Step 5: Solve for x
   x = 6,792,787,475.90/89,173.98
6. Step 6: Final answer
   x = 76,174.55