Finding the Fourth Proportional to 19,111.54, 26,386.42 and 12,416.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,111.54 : 26,386.42 = 12,416.25 : x
2. Step 2: Convert to fraction form
   19,111.54/26,386.42 = 12,416.25/x
3. Step 3: Cross multiply
   19,111.54x = 26,386.42 × 12,416.25
4. Step 4: Simplify right side
   19,111.54x = 327,620,387.33
5. Step 5: Solve for x
   x = 327,620,387.33/19,111.54
6. Step 6: Final answer
   x = 17,142.54