Finding the Fourth Proportional to 30,648.48, 42,294.94 and 17,219.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,648.48 : 42,294.94 = 17,219.72 : x
2. Step 2: Convert to fraction form
   30,648.48/42,294.94 = 17,219.72/x
3. Step 3: Cross multiply
   30,648.48x = 42,294.94 × 17,219.72
4. Step 4: Simplify right side
   30,648.48x = 728,307,024.22
5. Step 5: Solve for x
   x = 728,307,024.22/30,648.48
6. Step 6: Final answer
   x = 23,763.23