Finding the Fourth Proportional to 139,317.37, 209,049.86 and 60,486.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139,317.37 : 209,049.86 = 60,486.95 : x
2. Step 2: Convert to fraction form
   139,317.37/209,049.86 = 60,486.95/x
3. Step 3: Cross multiply
   139,317.37x = 209,049.86 × 60,486.95
4. Step 4: Simplify right side
   139,317.37x = 12,644,789,103.17
5. Step 5: Solve for x
   x = 12,644,789,103.17/139,317.37
6. Step 6: Final answer
   x = 90,762.48