Finding the Fourth Proportional to 30,819.48, 42,528.54 and 17,391.99

Step by Step Solution

1. Step 1: Write the proportion equation
   30,819.48 : 42,528.54 = 17,391.99 : x
2. Step 2: Convert to fraction form
   30,819.48/42,528.54 = 17,391.99/x
3. Step 3: Cross multiply
   30,819.48x = 42,528.54 × 17,391.99
4. Step 4: Simplify right side
   30,819.48x = 739,655,942.39
5. Step 5: Solve for x
   x = 739,655,942.39/30,819.48
6. Step 6: Final answer
   x = 23,999.62