Finding the Fourth Proportional to 139,162.92, 208,776.22 and 60,290.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,162.92 : 208,776.22 = 60,290.28 : x
2. Step 2: Convert to fraction form
   139,162.92/208,776.22 = 60,290.28/x
3. Step 3: Cross multiply
   139,162.92x = 208,776.22 × 60,290.28
4. Step 4: Simplify right side
   139,162.92x = 12,587,176,761.14
5. Step 5: Solve for x
   x = 12,587,176,761.14/139,162.92
6. Step 6: Final answer
   x = 90,449.21