Finding the Fourth Proportional to 50,820, 70,131.60 and 30,948

Step by Step Solution

1. Step 1: Write the proportion equation
   50,820 : 70,131.60 = 30,948 : x
2. Step 2: Convert to fraction form
   50,820/70,131.60 = 30,948/x
3. Step 3: Cross multiply
   50,820x = 70,131.60 × 30,948
4. Step 4: Simplify right side
   50,820x = 2,170,432,756.80
5. Step 5: Solve for x
   x = 2,170,432,756.80/50,820
6. Step 6: Final answer
   x = 42,708.24