Finding the Fourth Proportional to 30,780.47, 42,474.49 and 17,355.03

Step by Step Solution

1. Step 1: Write the proportion equation
   30,780.47 : 42,474.49 = 17,355.03 : x
2. Step 2: Convert to fraction form
   30,780.47/42,474.49 = 17,355.03/x
3. Step 3: Cross multiply
   30,780.47x = 42,474.49 × 17,355.03
4. Step 4: Simplify right side
   30,780.47x = 737,146,048.18
5. Step 5: Solve for x
   x = 737,146,048.18/30,780.47
6. Step 6: Final answer
   x = 23,948.50