Finding the Fourth Proportional to 139,103.98, 208,377.69 and 64,121.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,103.98 : 208,377.69 = 64,121.56 : x
2. Step 2: Convert to fraction form
   139,103.98/208,377.69 = 64,121.56/x
3. Step 3: Cross multiply
   139,103.98x = 208,377.69 × 64,121.56
4. Step 4: Simplify right side
   139,103.98x = 13,361,502,552.00
5. Step 5: Solve for x
   x = 13,361,502,552.00/139,103.98
6. Step 6: Final answer
   x = 96,054.06