Finding the Fourth Proportional to 105,744.80, 145,851.36 and 89,804

Step by Step Solution

1. Step 1: Write the proportion equation
   105,744.80 : 145,851.36 = 89,804 : x
2. Step 2: Convert to fraction form
   105,744.80/145,851.36 = 89,804/x
3. Step 3: Cross multiply
   105,744.80x = 145,851.36 × 89,804
4. Step 4: Simplify right side
   105,744.80x = 13,098,035,533.44
5. Step 5: Solve for x
   x = 13,098,035,533.44/105,744.80
6. Step 6: Final answer
   x = 123,864.58