Finding the Fourth Proportional to 139,645.56, 209,436.80 and 39,803.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,645.56 : 209,436.80 = 39,803.61 : x
2. Step 2: Convert to fraction form
   139,645.56/209,436.80 = 39,803.61/x
3. Step 3: Cross multiply
   139,645.56x = 209,436.80 × 39,803.61
4. Step 4: Simplify right side
   139,645.56x = 8,336,340,507.83
5. Step 5: Solve for x
   x = 8,336,340,507.83/139,645.56
6. Step 6: Final answer
   x = 59,696.42