Finding the Fourth Proportional to 139,383.57, 209,066.88 and 49,430.73

Step by Step Solution

1. Step 1: Write the proportion equation
   139,383.57 : 209,066.88 = 49,430.73 : x
2. Step 2: Convert to fraction form
   139,383.57/209,066.88 = 49,430.73/x
3. Step 3: Cross multiply
   139,383.57x = 209,066.88 × 49,430.73
4. Step 4: Simplify right side
   139,383.57x = 10,334,328,497.22
5. Step 5: Solve for x
   x = 10,334,328,497.22/139,383.57
6. Step 6: Final answer
   x = 74,143.09