Finding the Fourth Proportional to 139,016.87, 208,363.98 and 63,979.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,016.87 : 208,363.98 = 63,979.46 : x
2. Step 2: Convert to fraction form
   139,016.87/208,363.98 = 63,979.46/x
3. Step 3: Cross multiply
   139,016.87x = 208,363.98 × 63,979.46
4. Step 4: Simplify right side
   139,016.87x = 13,331,014,923.85
5. Step 5: Solve for x
   x = 13,331,014,923.85/139,016.87
6. Step 6: Final answer
   x = 95,894.94