Finding the Fourth Proportional to 89,608.38, 123,639.72 and 51,860.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,608.38 : 123,639.72 = 51,860.76 : x
2. Step 2: Convert to fraction form
   89,608.38/123,639.72 = 51,860.76/x
3. Step 3: Cross multiply
   89,608.38x = 123,639.72 × 51,860.76
4. Step 4: Simplify right side
   89,608.38x = 6,412,049,845.39
5. Step 5: Solve for x
   x = 6,412,049,845.39/89,608.38
6. Step 6: Final answer
   x = 71,556.36