Finding the Fourth Proportional to 30,568.88, 42,145.56 and 19,794.60

Step by Step Solution

1. Step 1: Write the proportion equation
   30,568.88 : 42,145.56 = 19,794.60 : x
2. Step 2: Convert to fraction form
   30,568.88/42,145.56 = 19,794.60/x
3. Step 3: Cross multiply
   30,568.88x = 42,145.56 × 19,794.60
4. Step 4: Simplify right side
   30,568.88x = 834,254,501.98
5. Step 5: Solve for x
   x = 834,254,501.98/30,568.88
6. Step 6: Final answer
   x = 27,290.98