Finding the Fourth Proportional to 123,690.71, 170,617.23 and 109,304.37

Step by Step Solution

1. Step 1: Write the proportion equation
   123,690.71 : 170,617.23 = 109,304.37 : x
2. Step 2: Convert to fraction form
   123,690.71/170,617.23 = 109,304.37/x
3. Step 3: Cross multiply
   123,690.71x = 170,617.23 × 109,304.37
4. Step 4: Simplify right side
   123,690.71x = 18,649,208,836.30
5. Step 5: Solve for x
   x = 18,649,208,836.30/123,690.71
6. Step 6: Final answer
   x = 150,772.92