Finding the Fourth Proportional to 21,314.75, 31,987.78 and 17,204.00

Step by Step Solution

1. Step 1: Write the proportion equation
   21,314.75 : 31,987.78 = 17,204.00 : x
2. Step 2: Convert to fraction form
   21,314.75/31,987.78 = 17,204.00/x
3. Step 3: Cross multiply
   21,314.75x = 31,987.78 × 17,204.00
4. Step 4: Simplify right side
   21,314.75x = 550,317,564.17
5. Step 5: Solve for x
   x = 550,317,564.17/21,314.75
6. Step 6: Final answer
   x = 25,818.63