Finding the Fourth Proportional to 30,812.58, 42,521.31 and 17,383.80

Step by Step Solution

1. Step 1: Write the proportion equation
   30,812.58 : 42,521.31 = 17,383.80 : x
2. Step 2: Convert to fraction form
   30,812.58/42,521.31 = 17,383.80/x
3. Step 3: Cross multiply
   30,812.58x = 42,521.31 × 17,383.80
4. Step 4: Simplify right side
   30,812.58x = 739,181,948.78
5. Step 5: Solve for x
   x = 739,181,948.78/30,812.58
6. Step 6: Final answer
   x = 23,989.62