Finding the Fourth Proportional to 83,142.72, 114,739.20 and 49,628.16

Step by Step Solution

1. Step 1: Write the proportion equation
   83,142.72 : 114,739.20 = 49,628.16 : x
2. Step 2: Convert to fraction form
   83,142.72/114,739.20 = 49,628.16/x
3. Step 3: Cross multiply
   83,142.72x = 114,739.20 × 49,628.16
4. Step 4: Simplify right side
   83,142.72x = 5,694,295,375.87
5. Step 5: Solve for x
   x = 5,694,295,375.87/83,142.72
6. Step 6: Final answer
   x = 68,488.20