Finding the Fourth Proportional to 89,781.81, 123,895.71 and 48,945.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89,781.81 : 123,895.71 = 48,945.09 : x
2. Step 2: Convert to fraction form
   89,781.81/123,895.71 = 48,945.09/x
3. Step 3: Cross multiply
   89,781.81x = 123,895.71 × 48,945.09
4. Step 4: Simplify right side
   89,781.81x = 6,064,086,986.30
5. Step 5: Solve for x
   x = 6,064,086,986.30/89,781.81
6. Step 6: Final answer
   x = 67,542.49