Finding the Fourth Proportional to 70,433.42, 105,668.52 and 20,512.42

Step by Step Solution

1. Step 1: Write the proportion equation
   70,433.42 : 105,668.52 = 20,512.42 : x
2. Step 2: Convert to fraction form
   70,433.42/105,668.52 = 20,512.42/x
3. Step 3: Cross multiply
   70,433.42x = 105,668.52 × 20,512.42
4. Step 4: Simplify right side
   70,433.42x = 2,167,517,063.02
5. Step 5: Solve for x
   x = 2,167,517,063.02/70,433.42
6. Step 6: Final answer
   x = 30,773.99