Finding the Fourth Proportional to 139,394.91, 208,974.82 and 60,449.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,394.91 : 208,974.82 = 60,449.68 : x
2. Step 2: Convert to fraction form
   139,394.91/208,974.82 = 60,449.68/x
3. Step 3: Cross multiply
   139,394.91x = 208,974.82 × 60,449.68
4. Step 4: Simplify right side
   139,394.91x = 12,632,460,997.06
5. Step 5: Solve for x
   x = 12,632,460,997.06/139,394.91
6. Step 6: Final answer
   x = 90,623.55