Finding the Fourth Proportional to 139,404.56, 209,105.91 and 39,564.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,404.56 : 209,105.91 = 39,564.81 : x
2. Step 2: Convert to fraction form
   139,404.56/209,105.91 = 39,564.81/x
3. Step 3: Cross multiply
   139,404.56x = 209,105.91 × 39,564.81
4. Step 4: Simplify right side
   139,404.56x = 8,273,235,599.03
5. Step 5: Solve for x
   x = 8,273,235,599.03/139,404.56
6. Step 6: Final answer
   x = 59,346.95