Finding the Fourth Proportional to 105,383.46, 145,362.69 and 73,540.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105,383.46 : 145,362.69 = 73,540.74 : x
2. Step 2: Convert to fraction form
   105,383.46/145,362.69 = 73,540.74/x
3. Step 3: Cross multiply
   105,383.46x = 145,362.69 × 73,540.74
4. Step 4: Simplify right side
   105,383.46x = 10,690,079,790.99
5. Step 5: Solve for x
   x = 10,690,079,790.99/105,383.46
6. Step 6: Final answer
   x = 101,439.83