Finding the Fourth Proportional to 139,783.93, 209,682.78 and 39,958.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,783.93 : 209,682.78 = 39,958.72 : x
2. Step 2: Convert to fraction form
   139,783.93/209,682.78 = 39,958.72/x
3. Step 3: Cross multiply
   139,783.93x = 209,682.78 × 39,958.72
4. Step 4: Simplify right side
   139,783.93x = 8,378,654,820.79
5. Step 5: Solve for x
   x = 8,378,654,820.79/139,783.93
6. Step 6: Final answer
   x = 59,940.04