Finding the Fourth Proportional to 139,189.23, 208,783.80 and 50,442.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,189.23 : 208,783.80 = 50,442.57 : x
2. Step 2: Convert to fraction form
   139,189.23/208,783.80 = 50,442.57/x
3. Step 3: Cross multiply
   139,189.23x = 208,783.80 × 50,442.57
4. Step 4: Simplify right side
   139,189.23x = 10,531,591,446.37
5. Step 5: Solve for x
   x = 10,531,591,446.37/139,189.23
6. Step 6: Final answer
   x = 75,663.84