Finding the Fourth Proportional to 139,436.76, 209,187.94 and 45,942.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,436.76 : 209,187.94 = 45,942.50 : x
2. Step 2: Convert to fraction form
   139,436.76/209,187.94 = 45,942.50/x
3. Step 3: Cross multiply
   139,436.76x = 209,187.94 × 45,942.50
4. Step 4: Simplify right side
   139,436.76x = 9,610,616,933.45
5. Step 5: Solve for x
   x = 9,610,616,933.45/139,436.76
6. Step 6: Final answer
   x = 68,924.56