Finding the Fourth Proportional to 83,654.72, 115,392.74 and 49,640.80

Step by Step Solution

1. Step 1: Write the proportion equation
   83,654.72 : 115,392.74 = 49,640.80 : x
2. Step 2: Convert to fraction form
   83,654.72/115,392.74 = 49,640.80/x
3. Step 3: Cross multiply
   83,654.72x = 115,392.74 × 49,640.80
4. Step 4: Simplify right side
   83,654.72x = 5,728,187,927.79
5. Step 5: Solve for x
   x = 5,728,187,927.79/83,654.72
6. Step 6: Final answer
   x = 68,474.17