Finding the Fourth Proportional to 139,271.35, 208,920.84 and 50,531.77

Step by Step Solution

1. Step 1: Write the proportion equation
   139,271.35 : 208,920.84 = 50,531.77 : x
2. Step 2: Convert to fraction form
   139,271.35/208,920.84 = 50,531.77/x
3. Step 3: Cross multiply
   139,271.35x = 208,920.84 × 50,531.77
4. Step 4: Simplify right side
   139,271.35x = 10,557,140,920.70
5. Step 5: Solve for x
   x = 10,557,140,920.70/139,271.35
6. Step 6: Final answer
   x = 75,802.68