Finding the Fourth Proportional to 139,292.50, 208,845.96 and 50,534.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,292.50 : 208,845.96 = 50,534.50 : x
2. Step 2: Convert to fraction form
   139,292.50/208,845.96 = 50,534.50/x
3. Step 3: Cross multiply
   139,292.50x = 208,845.96 × 50,534.50
4. Step 4: Simplify right side
   139,292.50x = 10,553,926,165.62
5. Step 5: Solve for x
   x = 10,553,926,165.62/139,292.50
6. Step 6: Final answer
   x = 75,768.09