Finding the Fourth Proportional to 139,023.72, 208,535.58 and 50,256.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,023.72 : 208,535.58 = 50,256.45 : x
2. Step 2: Convert to fraction form
   139,023.72/208,535.58 = 50,256.45/x
3. Step 3: Cross multiply
   139,023.72x = 208,535.58 × 50,256.45
4. Step 4: Simplify right side
   139,023.72x = 10,480,257,949.49
5. Step 5: Solve for x
   x = 10,480,257,949.49/139,023.72
6. Step 6: Final answer
   x = 75,384.68