Finding the Fourth Proportional to 89,839.46, 123,978.20 and 51,601.49

Step by Step Solution

1. Step 1: Write the proportion equation
   89,839.46 : 123,978.20 = 51,601.49 : x
2. Step 2: Convert to fraction form
   89,839.46/123,978.20 = 51,601.49/x
3. Step 3: Cross multiply
   89,839.46x = 123,978.20 × 51,601.49
4. Step 4: Simplify right side
   89,839.46x = 6,397,458,969.62
5. Step 5: Solve for x
   x = 6,397,458,969.62/89,839.46
6. Step 6: Final answer
   x = 71,209.90