Finding the Fourth Proportional to 89,173.42, 123,072 and 55,192.84

Step by Step Solution

1. Step 1: Write the proportion equation
   89,173.42 : 123,072 = 55,192.84 : x
2. Step 2: Convert to fraction form
   89,173.42/123,072 = 55,192.84/x
3. Step 3: Cross multiply
   89,173.42x = 123,072 × 55,192.84
4. Step 4: Simplify right side
   89,173.42x = 6,792,693,204.48
5. Step 5: Solve for x
   x = 6,792,693,204.48/89,173.42
6. Step 6: Final answer
   x = 76,173.97