Finding the Fourth Proportional to 70,563.48, 105,818.56 and 28,429.28

Step by Step Solution

1. Step 1: Write the proportion equation
   70,563.48 : 105,818.56 = 28,429.28 : x
2. Step 2: Convert to fraction form
   70,563.48/105,818.56 = 28,429.28/x
3. Step 3: Cross multiply
   70,563.48x = 105,818.56 × 28,429.28
4. Step 4: Simplify right side
   70,563.48x = 3,008,345,471.44
5. Step 5: Solve for x
   x = 3,008,345,471.44/70,563.48
6. Step 6: Final answer
   x = 42,633.18