Finding the Fourth Proportional to 70,024.29, 105,020.43 and 20,103.99

Step by Step Solution

1. Step 1: Write the proportion equation
   70,024.29 : 105,020.43 = 20,103.99 : x
2. Step 2: Convert to fraction form
   70,024.29/105,020.43 = 20,103.99/x
3. Step 3: Cross multiply
   70,024.29x = 105,020.43 × 20,103.99
4. Step 4: Simplify right side
   70,024.29x = 2,111,329,674.52
5. Step 5: Solve for x
   x = 2,111,329,674.52/70,024.29
6. Step 6: Final answer
   x = 30,151.39