Finding the Fourth Proportional to 139,575.16, 209,418.72 and 50,834.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,575.16 : 209,418.72 = 50,834.80 : x
2. Step 2: Convert to fraction form
   139,575.16/209,418.72 = 50,834.80/x
3. Step 3: Cross multiply
   139,575.16x = 209,418.72 × 50,834.80
4. Step 4: Simplify right side
   139,575.16x = 10,645,758,747.46
5. Step 5: Solve for x
   x = 10,645,758,747.46/139,575.16
6. Step 6: Final answer
   x = 76,272.59