Finding the Fourth Proportional to 30,713.71, 42,390.72 and 19,233.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,713.71 : 42,390.72 = 19,233.96 : x
2. Step 2: Convert to fraction form
   30,713.71/42,390.72 = 19,233.96/x
3. Step 3: Cross multiply
   30,713.71x = 42,390.72 × 19,233.96
4. Step 4: Simplify right side
   30,713.71x = 815,341,412.85
5. Step 5: Solve for x
   x = 815,341,412.85/30,713.71
6. Step 6: Final answer
   x = 26,546.50