Finding the Fourth Proportional to 70,043.14, 105,053.43 and 20,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   70,043.14 : 105,053.43 = 20,111.88 : x
2. Step 2: Convert to fraction form
   70,043.14/105,053.43 = 20,111.88/x
3. Step 3: Cross multiply
   70,043.14x = 105,053.43 × 20,111.88
4. Step 4: Simplify right side
   70,043.14x = 2,112,821,493.18
5. Step 5: Solve for x
   x = 2,112,821,493.18/70,043.14
6. Step 6: Final answer
   x = 30,164.58