Finding the Fourth Proportional to 139,943.98, 209,948.78 and 46,449.73

Step by Step Solution

1. Step 1: Write the proportion equation
   139,943.98 : 209,948.78 = 46,449.73 : x
2. Step 2: Convert to fraction form
   139,943.98/209,948.78 = 46,449.73/x
3. Step 3: Cross multiply
   139,943.98x = 209,948.78 × 46,449.73
4. Step 4: Simplify right side
   139,943.98x = 9,752,064,144.83
5. Step 5: Solve for x
   x = 9,752,064,144.83/139,943.98
6. Step 6: Final answer
   x = 69,685.49