Finding the Fourth Proportional to 70,942.71, 106,402.41 and 28,821.09

Step by Step Solution

1. Step 1: Write the proportion equation
   70,942.71 : 106,402.41 = 28,821.09 : x
2. Step 2: Convert to fraction form
   70,942.71/106,402.41 = 28,821.09/x
3. Step 3: Cross multiply
   70,942.71x = 106,402.41 × 28,821.09
4. Step 4: Simplify right side
   70,942.71x = 3,066,633,534.58
5. Step 5: Solve for x
   x = 3,066,633,534.58/70,942.71
6. Step 6: Final answer
   x = 43,226.90