Finding the Fourth Proportional to 13,925.82, 19,217.61 and 7,638.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,925.82 : 19,217.61 = 7,638.18 : x
2. Step 2: Convert to fraction form
   13,925.82/19,217.61 = 7,638.18/x
3. Step 3: Cross multiply
   13,925.82x = 19,217.61 × 7,638.18
4. Step 4: Simplify right side
   13,925.82x = 146,787,564.35
5. Step 5: Solve for x
   x = 146,787,564.35/13,925.82
6. Step 6: Final answer
   x = 10,540.68