Finding the Fourth Proportional to 70,369.98, 105,561.89 and 20,450.51

Step by Step Solution

1. Step 1: Write the proportion equation
   70,369.98 : 105,561.89 = 20,450.51 : x
2. Step 2: Convert to fraction form
   70,369.98/105,561.89 = 20,450.51/x
3. Step 3: Cross multiply
   70,369.98x = 105,561.89 × 20,450.51
4. Step 4: Simplify right side
   70,369.98x = 2,158,794,487.06
5. Step 5: Solve for x
   x = 2,158,794,487.06/70,369.98
6. Step 6: Final answer
   x = 30,677.78