Finding the Fourth Proportional to 67,128.32, 100,697.34 and 20,384.84

Step by Step Solution

1. Step 1: Write the proportion equation
   67,128.32 : 100,697.34 = 20,384.84 : x
2. Step 2: Convert to fraction form
   67,128.32/100,697.34 = 20,384.84/x
3. Step 3: Cross multiply
   67,128.32x = 100,697.34 × 20,384.84
4. Step 4: Simplify right side
   67,128.32x = 2,052,699,164.33
5. Step 5: Solve for x
   x = 2,052,699,164.33/67,128.32
6. Step 6: Final answer
   x = 30,578.74