Finding the Fourth Proportional to 123,643.38, 170,636.34 and 69,928.38

Step by Step Solution

1. Step 1: Write the proportion equation
   123,643.38 : 170,636.34 = 69,928.38 : x
2. Step 2: Convert to fraction form
   123,643.38/170,636.34 = 69,928.38/x
3. Step 3: Cross multiply
   123,643.38x = 170,636.34 × 69,928.38
4. Step 4: Simplify right side
   123,643.38x = 11,932,322,825.33
5. Step 5: Solve for x
   x = 11,932,322,825.33/123,643.38
6. Step 6: Final answer
   x = 96,505.96