Finding the Fourth Proportional to 139,071.80, 208,515.48 and 50,313.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,071.80 : 208,515.48 = 50,313.56 : x
2. Step 2: Convert to fraction form
   139,071.80/208,515.48 = 50,313.56/x
3. Step 3: Cross multiply
   139,071.80x = 208,515.48 × 50,313.56
4. Step 4: Simplify right side
   139,071.80x = 10,491,156,113.91
5. Step 5: Solve for x
   x = 10,491,156,113.91/139,071.80
6. Step 6: Final answer
   x = 75,436.98