Finding the Fourth Proportional to 30,647.72, 42,294.93 and 17,218.70

Step by Step Solution

1. Step 1: Write the proportion equation
   30,647.72 : 42,294.93 = 17,218.70 : x
2. Step 2: Convert to fraction form
   30,647.72/42,294.93 = 17,218.70/x
3. Step 3: Cross multiply
   30,647.72x = 42,294.93 × 17,218.70
4. Step 4: Simplify right side
   30,647.72x = 728,263,499.72
5. Step 5: Solve for x
   x = 728,263,499.72/30,647.72
6. Step 6: Final answer
   x = 23,762.41