Finding the Fourth Proportional to 70,107.51, 105,162.18 and 20,188.43

Step by Step Solution

1. Step 1: Write the proportion equation
   70,107.51 : 105,162.18 = 20,188.43 : x
2. Step 2: Convert to fraction form
   70,107.51/105,162.18 = 20,188.43/x
3. Step 3: Cross multiply
   70,107.51x = 105,162.18 × 20,188.43
4. Step 4: Simplify right side
   70,107.51x = 2,123,059,309.58
5. Step 5: Solve for x
   x = 2,123,059,309.58/70,107.51
6. Step 6: Final answer
   x = 30,282.91