Finding the Fourth Proportional to 123,614.54, 170,282.71 and 105,405.97

Step by Step Solution

1. Step 1: Write the proportion equation
   123,614.54 : 170,282.71 = 105,405.97 : x
2. Step 2: Convert to fraction form
   123,614.54/170,282.71 = 105,405.97/x
3. Step 3: Cross multiply
   123,614.54x = 170,282.71 × 105,405.97
4. Step 4: Simplify right side
   123,614.54x = 17,948,813,654.20
5. Step 5: Solve for x
   x = 17,948,813,654.20/123,614.54
6. Step 6: Final answer
   x = 145,199.86