Finding the Fourth Proportional to 139,047.78, 208,560.79 and 39,203.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,047.78 : 208,560.79 = 39,203.94 : x
2. Step 2: Convert to fraction form
   139,047.78/208,560.79 = 39,203.94/x
3. Step 3: Cross multiply
   139,047.78x = 208,560.79 × 39,203.94
4. Step 4: Simplify right side
   139,047.78x = 8,176,404,697.51
5. Step 5: Solve for x
   x = 8,176,404,697.51/139,047.78
6. Step 6: Final answer
   x = 58,802.84