Finding the Fourth Proportional to 25,223.34, 34,806.85 and 13,890.63

Step by Step Solution

1. Step 1: Write the proportion equation
   25,223.34 : 34,806.85 = 13,890.63 : x
2. Step 2: Convert to fraction form
   25,223.34/34,806.85 = 13,890.63/x
3. Step 3: Cross multiply
   25,223.34x = 34,806.85 × 13,890.63
4. Step 4: Simplify right side
   25,223.34x = 483,489,074.82
5. Step 5: Solve for x
   x = 483,489,074.82/25,223.34
6. Step 6: Final answer
   x = 19,168.32