Finding the Fourth Proportional to 30,419.61, 41,978.73 and 16,992.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,419.61 : 41,978.73 = 16,992.18 : x
2. Step 2: Convert to fraction form
   30,419.61/41,978.73 = 16,992.18/x
3. Step 3: Cross multiply
   30,419.61x = 41,978.73 × 16,992.18
4. Step 4: Simplify right side
   30,419.61x = 713,310,136.33
5. Step 5: Solve for x
   x = 713,310,136.33/30,419.61
6. Step 6: Final answer
   x = 23,449.02