Finding the Fourth Proportional to 139,286, 209,012.02 and 50,546.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,286 : 209,012.02 = 50,546.43 : x
2. Step 2: Convert to fraction form
   139,286/209,012.02 = 50,546.43/x
3. Step 3: Cross multiply
   139,286x = 209,012.02 × 50,546.43
4. Step 4: Simplify right side
   139,286x = 10,564,811,438.09
5. Step 5: Solve for x
   x = 10,564,811,438.09/139,286
6. Step 6: Final answer
   x = 75,849.77