Finding the Fourth Proportional to 70,907.42, 106,358.94 and 28,786.47

Step by Step Solution

1. Step 1: Write the proportion equation
   70,907.42 : 106,358.94 = 28,786.47 : x
2. Step 2: Convert to fraction form
   70,907.42/106,358.94 = 28,786.47/x
3. Step 3: Cross multiply
   70,907.42x = 106,358.94 × 28,786.47
4. Step 4: Simplify right side
   70,907.42x = 3,061,698,435.54
5. Step 5: Solve for x
   x = 3,061,698,435.54/70,907.42
6. Step 6: Final answer
   x = 43,178.82