Finding the Fourth Proportional to 70,870.58, 106,309.74 and 28,744.40

Step by Step Solution

1. Step 1: Write the proportion equation
   70,870.58 : 106,309.74 = 28,744.40 : x
2. Step 2: Convert to fraction form
   70,870.58/106,309.74 = 28,744.40/x
3. Step 3: Cross multiply
   70,870.58x = 106,309.74 × 28,744.40
4. Step 4: Simplify right side
   70,870.58x = 3,055,809,158.91
5. Step 5: Solve for x
   x = 3,055,809,158.91/70,870.58
6. Step 6: Final answer
   x = 43,118.17