Finding the Fourth Proportional to 139,645.32, 209,436.42 and 39,803.36

Step by Step Solution

1. Step 1: Write the proportion equation
   139,645.32 : 209,436.42 = 39,803.36 : x
2. Step 2: Convert to fraction form
   139,645.32/209,436.42 = 39,803.36/x
3. Step 3: Cross multiply
   139,645.32x = 209,436.42 × 39,803.36
4. Step 4: Simplify right side
   139,645.32x = 8,336,273,222.37
5. Step 5: Solve for x
   x = 8,336,273,222.37/139,645.32
6. Step 6: Final answer
   x = 59,696.04