Finding the Fourth Proportional to 30,764.72, 42,458.74 and 19,433.67

Step by Step Solution

1. Step 1: Write the proportion equation
   30,764.72 : 42,458.74 = 19,433.67 : x
2. Step 2: Convert to fraction form
   30,764.72/42,458.74 = 19,433.67/x
3. Step 3: Cross multiply
   30,764.72x = 42,458.74 × 19,433.67
4. Step 4: Simplify right side
   30,764.72x = 825,129,367.80
5. Step 5: Solve for x
   x = 825,129,367.80/30,764.72
6. Step 6: Final answer
   x = 26,820.63