Finding the Fourth Proportional to 89,957.69, 124,178.57 and 61,371.71

Step by Step Solution

1. Step 1: Write the proportion equation
   89,957.69 : 124,178.57 = 61,371.71 : x
2. Step 2: Convert to fraction form
   89,957.69/124,178.57 = 61,371.71/x
3. Step 3: Cross multiply
   89,957.69x = 124,178.57 × 61,371.71
4. Step 4: Simplify right side
   89,957.69x = 7,621,050,258.50
5. Step 5: Solve for x
   x = 7,621,050,258.50/89,957.69
6. Step 6: Final answer
   x = 84,718.17