Finding the Fourth Proportional to 25,630, 35,369.40 and 13,854

Step by Step Solution

1. Step 1: Write the proportion equation
   25,630 : 35,369.40 = 13,854 : x
2. Step 2: Convert to fraction form
   25,630/35,369.40 = 13,854/x
3. Step 3: Cross multiply
   25,630x = 35,369.40 × 13,854
4. Step 4: Simplify right side
   25,630x = 490,007,667.60
5. Step 5: Solve for x
   x = 490,007,667.60/25,630
6. Step 6: Final answer
   x = 19,118.52