Finding the Fourth Proportional to 139,115.39, 208,672.43 and 50,348.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,115.39 : 208,672.43 = 50,348.09 : x
2. Step 2: Convert to fraction form
   139,115.39/208,672.43 = 50,348.09/x
3. Step 3: Cross multiply
   139,115.39x = 208,672.43 × 50,348.09
4. Step 4: Simplify right side
   139,115.39x = 10,506,258,556.10
5. Step 5: Solve for x
   x = 10,506,258,556.10/139,115.39
6. Step 6: Final answer
   x = 75,521.90