Finding the Fourth Proportional to 89,910.76, 123,979.62 and 61,249

Step by Step Solution

1. Step 1: Write the proportion equation
   89,910.76 : 123,979.62 = 61,249 : x
2. Step 2: Convert to fraction form
   89,910.76/123,979.62 = 61,249/x
3. Step 3: Cross multiply
   89,910.76x = 123,979.62 × 61,249
4. Step 4: Simplify right side
   89,910.76x = 7,593,627,745.38
5. Step 5: Solve for x
   x = 7,593,627,745.38/89,910.76
6. Step 6: Final answer
   x = 84,457.39