Finding the Fourth Proportional to 139,055.50, 208,589.73 and 40,559.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,055.50 : 208,589.73 = 40,559.50 : x
2. Step 2: Convert to fraction form
   139,055.50/208,589.73 = 40,559.50/x
3. Step 3: Cross multiply
   139,055.50x = 208,589.73 × 40,559.50
4. Step 4: Simplify right side
   139,055.50x = 8,460,295,153.94
5. Step 5: Solve for x
   x = 8,460,295,153.94/139,055.50
6. Step 6: Final answer
   x = 60,841.14