Finding the Fourth Proportional to 139,044.89, 208,583.54 and 50,340.17

Step by Step Solution

1. Step 1: Write the proportion equation
   139,044.89 : 208,583.54 = 50,340.17 : x
2. Step 2: Convert to fraction form
   139,044.89/208,583.54 = 50,340.17/x
3. Step 3: Cross multiply
   139,044.89x = 208,583.54 × 50,340.17
4. Step 4: Simplify right side
   139,044.89x = 10,500,129,568.18
5. Step 5: Solve for x
   x = 10,500,129,568.18/139,044.89
6. Step 6: Final answer
   x = 75,516.12