Finding the Fourth Proportional to 13,691.85, 18,894.71 and 7,404.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,691.85 : 18,894.71 = 7,404.23 : x
2. Step 2: Convert to fraction form
   13,691.85/18,894.71 = 7,404.23/x
3. Step 3: Cross multiply
   13,691.85x = 18,894.71 × 7,404.23
4. Step 4: Simplify right side
   13,691.85x = 139,900,647.13
5. Step 5: Solve for x
   x = 139,900,647.13/13,691.85
6. Step 6: Final answer
   x = 10,217.80