Finding the Fourth Proportional to 89,170.98, 123,068.52 and 55,190.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,170.98 : 123,068.52 = 55,190.31 : x
2. Step 2: Convert to fraction form
   89,170.98/123,068.52 = 55,190.31/x
3. Step 3: Cross multiply
   89,170.98x = 123,068.52 × 55,190.31
4. Step 4: Simplify right side
   89,170.98x = 6,792,189,770.04
5. Step 5: Solve for x
   x = 6,792,189,770.04/89,170.98
6. Step 6: Final answer
   x = 76,170.41