Finding the Fourth Proportional to 30,493.39, 42,085.65 and 19,164.43

Step by Step Solution

1. Step 1: Write the proportion equation
   30,493.39 : 42,085.65 = 19,164.43 : x
2. Step 2: Convert to fraction form
   30,493.39/42,085.65 = 19,164.43/x
3. Step 3: Cross multiply
   30,493.39x = 42,085.65 × 19,164.43
4. Step 4: Simplify right side
   30,493.39x = 806,547,493.43
5. Step 5: Solve for x
   x = 806,547,493.43/30,493.39
6. Step 6: Final answer
   x = 26,449.91