Finding the Fourth Proportional to 139,267.48, 208,901.56 and 50,521.07

Step by Step Solution

1. Step 1: Write the proportion equation
   139,267.48 : 208,901.56 = 50,521.07 : x
2. Step 2: Convert to fraction form
   139,267.48/208,901.56 = 50,521.07/x
3. Step 3: Cross multiply
   139,267.48x = 208,901.56 × 50,521.07
4. Step 4: Simplify right side
   139,267.48x = 10,553,929,509.39
5. Step 5: Solve for x
   x = 10,553,929,509.39/139,267.48
6. Step 6: Final answer
   x = 75,781.72