Finding the Fourth Proportional to 30,673.86, 42,317.35 and 19,339.74

Step by Step Solution

1. Step 1: Write the proportion equation
   30,673.86 : 42,317.35 = 19,339.74 : x
2. Step 2: Convert to fraction form
   30,673.86/42,317.35 = 19,339.74/x
3. Step 3: Cross multiply
   30,673.86x = 42,317.35 × 19,339.74
4. Step 4: Simplify right side
   30,673.86x = 818,406,546.49
5. Step 5: Solve for x
   x = 818,406,546.49/30,673.86
6. Step 6: Final answer
   x = 26,680.91