Finding the Fourth Proportional to 89,721.96, 123,815.69 and 49,434.79

Step by Step Solution

1. Step 1: Write the proportion equation
   89,721.96 : 123,815.69 = 49,434.79 : x
2. Step 2: Convert to fraction form
   89,721.96/123,815.69 = 49,434.79/x
3. Step 3: Cross multiply
   89,721.96x = 123,815.69 × 49,434.79
4. Step 4: Simplify right side
   89,721.96x = 6,120,802,014.78
5. Step 5: Solve for x
   x = 6,120,802,014.78/89,721.96
6. Step 6: Final answer
   x = 68,219.66