Finding the Fourth Proportional to 70,108.76, 105,164.06 and 20,189.68

Step by Step Solution

1. Step 1: Write the proportion equation
   70,108.76 : 105,164.06 = 20,189.68 : x
2. Step 2: Convert to fraction form
   70,108.76/105,164.06 = 20,189.68/x
3. Step 3: Cross multiply
   70,108.76x = 105,164.06 × 20,189.68
4. Step 4: Simplify right side
   70,108.76x = 2,123,228,355.04
5. Step 5: Solve for x
   x = 2,123,228,355.04/70,108.76
6. Step 6: Final answer
   x = 30,284.78