Finding the Fourth Proportional to 139,436.25, 209,112.45 and 39,604.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,436.25 : 209,112.45 = 39,604.56 : x
2. Step 2: Convert to fraction form
   139,436.25/209,112.45 = 39,604.56/x
3. Step 3: Cross multiply
   139,436.25x = 209,112.45 × 39,604.56
4. Step 4: Simplify right side
   139,436.25x = 8,281,806,572.77
5. Step 5: Solve for x
   x = 8,281,806,572.77/139,436.25
6. Step 6: Final answer
   x = 59,394.93