Finding the Fourth Proportional to 139,057, 208,591.98 and 40,561

Step by Step Solution

1. Step 1: Write the proportion equation
   139,057 : 208,591.98 = 40,561 : x
2. Step 2: Convert to fraction form
   139,057/208,591.98 = 40,561/x
3. Step 3: Cross multiply
   139,057x = 208,591.98 × 40,561
4. Step 4: Simplify right side
   139,057x = 8,460,699,300.78
5. Step 5: Solve for x
   x = 8,460,699,300.78/139,057
6. Step 6: Final answer
   x = 60,843.39