Finding the Fourth Proportional to 25,120.99, 34,667.42 and 13,791.55

Step by Step Solution

1. Step 1: Write the proportion equation
   25,120.99 : 34,667.42 = 13,791.55 : x
2. Step 2: Convert to fraction form
   25,120.99/34,667.42 = 13,791.55/x
3. Step 3: Cross multiply
   25,120.99x = 34,667.42 × 13,791.55
4. Step 4: Simplify right side
   25,120.99x = 478,117,456.30
5. Step 5: Solve for x
   x = 478,117,456.30/25,120.99
6. Step 6: Final answer
   x = 19,032.59