Finding the Fourth Proportional to 89,173.74, 123,072.28 and 55,193.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89,173.74 : 123,072.28 = 55,193.10 : x
2. Step 2: Convert to fraction form
   89,173.74/123,072.28 = 55,193.10/x
3. Step 3: Cross multiply
   89,173.74x = 123,072.28 × 55,193.10
4. Step 4: Simplify right side
   89,173.74x = 6,792,740,657.27
5. Step 5: Solve for x
   x = 6,792,740,657.27/89,173.74
6. Step 6: Final answer
   x = 76,174.23