Finding the Fourth Proportional to 50,821.70, 70,140.53 and 30,689.96

Step by Step Solution

1. Step 1: Write the proportion equation
   50,821.70 : 70,140.53 = 30,689.96 : x
2. Step 2: Convert to fraction form
   50,821.70/70,140.53 = 30,689.96/x
3. Step 3: Cross multiply
   50,821.70x = 70,140.53 × 30,689.96
4. Step 4: Simplify right side
   50,821.70x = 2,152,609,786.10
5. Step 5: Solve for x
   x = 2,152,609,786.10/50,821.70
6. Step 6: Final answer
   x = 42,356.12