Finding the Fourth Proportional to 139,072.92, 208,645.83 and 60,168.66

Step by Step Solution

1. Step 1: Write the proportion equation
   139,072.92 : 208,645.83 = 60,168.66 : x
2. Step 2: Convert to fraction form
   139,072.92/208,645.83 = 60,168.66/x
3. Step 3: Cross multiply
   139,072.92x = 208,645.83 × 60,168.66
4. Step 4: Simplify right side
   139,072.92x = 12,553,940,005.69
5. Step 5: Solve for x
   x = 12,553,940,005.69/139,072.92
6. Step 6: Final answer
   x = 90,268.76