Finding the Fourth Proportional to 139,245.57, 208,868.09 and 50,498.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,245.57 : 208,868.09 = 50,498.82 : x
2. Step 2: Convert to fraction form
   139,245.57/208,868.09 = 50,498.82/x
3. Step 3: Cross multiply
   139,245.57x = 208,868.09 × 50,498.82
4. Step 4: Simplify right side
   139,245.57x = 10,547,591,828.16
5. Step 5: Solve for x
   x = 10,547,591,828.16/139,245.57
6. Step 6: Final answer
   x = 75,748.13