Finding the Fourth Proportional to 30,865, 42,614.18 and 19,109.48

Step by Step Solution

1. Step 1: Write the proportion equation
   30,865 : 42,614.18 = 19,109.48 : x
2. Step 2: Convert to fraction form
   30,865/42,614.18 = 19,109.48/x
3. Step 3: Cross multiply
   30,865x = 42,614.18 × 19,109.48
4. Step 4: Simplify right side
   30,865x = 814,334,820.43
5. Step 5: Solve for x
   x = 814,334,820.43/30,865
6. Step 6: Final answer
   x = 26,383.76