Finding the Fourth Proportional to 139,153.82, 208,793.01 and 79,989.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,153.82 : 208,793.01 = 79,989.48 : x
2. Step 2: Convert to fraction form
   139,153.82/208,793.01 = 79,989.48/x
3. Step 3: Cross multiply
   139,153.82x = 208,793.01 × 79,989.48
4. Step 4: Simplify right side
   139,153.82x = 16,701,244,297.53
5. Step 5: Solve for x
   x = 16,701,244,297.53/139,153.82
6. Step 6: Final answer
   x = 120,020.02