Finding the Fourth Proportional to 25,222.78, 34,806.06 and 13,890.12

Step by Step Solution

1. Step 1: Write the proportion equation
   25,222.78 : 34,806.06 = 13,890.12 : x
2. Step 2: Convert to fraction form
   25,222.78/34,806.06 = 13,890.12/x
3. Step 3: Cross multiply
   25,222.78x = 34,806.06 × 13,890.12
4. Step 4: Simplify right side
   25,222.78x = 483,460,350.13
5. Step 5: Solve for x
   x = 483,460,350.13/25,222.78
6. Step 6: Final answer
   x = 19,167.61