Finding the Fourth Proportional to 70,659.18, 105,992.42 and 18,069.12

Step by Step Solution

1. Step 1: Write the proportion equation
   70,659.18 : 105,992.42 = 18,069.12 : x
2. Step 2: Convert to fraction form
   70,659.18/105,992.42 = 18,069.12/x
3. Step 3: Cross multiply
   70,659.18x = 105,992.42 × 18,069.12
4. Step 4: Simplify right side
   70,659.18x = 1,915,189,665.72
5. Step 5: Solve for x
   x = 1,915,189,665.72/70,659.18
6. Step 6: Final answer
   x = 27,104.61