Finding the Fourth Proportional to 89,665.65, 123,738.62 and 49,379.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,665.65 : 123,738.62 = 49,379.31 : x
2. Step 2: Convert to fraction form
   89,665.65/123,738.62 = 49,379.31/x
3. Step 3: Cross multiply
   89,665.65x = 123,738.62 × 49,379.31
4. Step 4: Simplify right side
   89,665.65x = 6,110,127,429.06
5. Step 5: Solve for x
   x = 6,110,127,429.06/89,665.65
6. Step 6: Final answer
   x = 68,143.46