Finding the Fourth Proportional to 30,948.56, 42,718.74 and 19,770.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,948.56 : 42,718.74 = 19,770.56 : x
2. Step 2: Convert to fraction form
   30,948.56/42,718.74 = 19,770.56/x
3. Step 3: Cross multiply
   30,948.56x = 42,718.74 × 19,770.56
4. Step 4: Simplify right side
   30,948.56x = 844,573,519.09
5. Step 5: Solve for x
   x = 844,573,519.09/30,948.56
6. Step 6: Final answer
   x = 27,289.59