Finding the Fourth Proportional to 210,517.98, 315,556.38 and 98,105.46

Step by Step Solution

1. Step 1: Write the proportion equation
   210,517.98 : 315,556.38 = 98,105.46 : x
2. Step 2: Convert to fraction form
   210,517.98/315,556.38 = 98,105.46/x
3. Step 3: Cross multiply
   210,517.98x = 315,556.38 × 98,105.46
4. Step 4: Simplify right side
   210,517.98x = 30,957,803,815.83
5. Step 5: Solve for x
   x = 30,957,803,815.83/210,517.98
6. Step 6: Final answer
   x = 147,055.39