Finding the Fourth Proportional to 139,440.78, 209,208.56 and 50,701.41

Step by Step Solution

1. Step 1: Write the proportion equation
   139,440.78 : 209,208.56 = 50,701.41 : x
2. Step 2: Convert to fraction form
   139,440.78/209,208.56 = 50,701.41/x
3. Step 3: Cross multiply
   139,440.78x = 209,208.56 × 50,701.41
4. Step 4: Simplify right side
   139,440.78x = 10,607,168,722.56
5. Step 5: Solve for x
   x = 10,607,168,722.56/139,440.78
6. Step 6: Final answer
   x = 76,069.34