Finding the Fourth Proportional to 30,915.73, 42,663.49 and 16,768.59

Step by Step Solution

1. Step 1: Write the proportion equation
   30,915.73 : 42,663.49 = 16,768.59 : x
2. Step 2: Convert to fraction form
   30,915.73/42,663.49 = 16,768.59/x
3. Step 3: Cross multiply
   30,915.73x = 42,663.49 × 16,768.59
4. Step 4: Simplify right side
   30,915.73x = 715,406,571.78
5. Step 5: Solve for x
   x = 715,406,571.78/30,915.73
6. Step 6: Final answer
   x = 23,140.54