Finding the Fourth Proportional to 139,243.69, 208,876.57 and 39,404.51

Step by Step Solution

1. Step 1: Write the proportion equation
   139,243.69 : 208,876.57 = 39,404.51 : x
2. Step 2: Convert to fraction form
   139,243.69/208,876.57 = 39,404.51/x
3. Step 3: Cross multiply
   139,243.69x = 208,876.57 × 39,404.51
4. Step 4: Simplify right side
   139,243.69x = 8,230,678,753.37
5. Step 5: Solve for x
   x = 8,230,678,753.37/139,243.69
6. Step 6: Final answer
   x = 59,109.89