Finding the Fourth Proportional to 70,574.06, 105,780.56 and 28,427.15

Step by Step Solution

1. Step 1: Write the proportion equation
   70,574.06 : 105,780.56 = 28,427.15 : x
2. Step 2: Convert to fraction form
   70,574.06/105,780.56 = 28,427.15/x
3. Step 3: Cross multiply
   70,574.06x = 105,780.56 × 28,427.15
4. Step 4: Simplify right side
   70,574.06x = 3,007,039,846.20
5. Step 5: Solve for x
   x = 3,007,039,846.20/70,574.06
6. Step 6: Final answer
   x = 42,608.29