Finding the Fourth Proportional to 13,691.91, 18,894.84 and 7,404.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,691.91 : 18,894.84 = 7,404.29 : x
2. Step 2: Convert to fraction form
   13,691.91/18,894.84 = 7,404.29/x
3. Step 3: Cross multiply
   13,691.91x = 18,894.84 × 7,404.29
4. Step 4: Simplify right side
   13,691.91x = 139,902,874.86
5. Step 5: Solve for x
   x = 139,902,874.86/13,691.91
6. Step 6: Final answer
   x = 10,217.92