Finding the Fourth Proportional to 30,665.07, 42,315.68 and 17,238.35

Step by Step Solution

1. Step 1: Write the proportion equation
   30,665.07 : 42,315.68 = 17,238.35 : x
2. Step 2: Convert to fraction form
   30,665.07/42,315.68 = 17,238.35/x
3. Step 3: Cross multiply
   30,665.07x = 42,315.68 × 17,238.35
4. Step 4: Simplify right side
   30,665.07x = 729,452,204.56
5. Step 5: Solve for x
   x = 729,452,204.56/30,665.07
6. Step 6: Final answer
   x = 23,787.72