Finding the Fourth Proportional to 21,774.96, 30,109.73 and 17,290.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,774.96 : 30,109.73 = 17,290.80 : x
2. Step 2: Convert to fraction form
   21,774.96/30,109.73 = 17,290.80/x
3. Step 3: Cross multiply
   21,774.96x = 30,109.73 × 17,290.80
4. Step 4: Simplify right side
   21,774.96x = 520,621,233.03
5. Step 5: Solve for x
   x = 520,621,233.03/21,774.96
6. Step 6: Final answer
   x = 23,909.17