Finding the Fourth Proportional to 123,439.30, 170,346.33 and 69,724.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,439.30 : 170,346.33 = 69,724.42 : x
2. Step 2: Convert to fraction form
   123,439.30/170,346.33 = 69,724.42/x
3. Step 3: Cross multiply
   123,439.30x = 170,346.33 × 69,724.42
4. Step 4: Simplify right side
   123,439.30x = 11,877,299,058.38
5. Step 5: Solve for x
   x = 11,877,299,058.38/123,439.30
6. Step 6: Final answer
   x = 96,219.75