Finding the Fourth Proportional to 12,691.45, 19,033.47 and 3,806.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.45 : 19,033.47 = 3,806.42 : x
2. Step 2: Convert to fraction form
   12,691.45/19,033.47 = 3,806.42/x
3. Step 3: Cross multiply
   12,691.45x = 19,033.47 × 3,806.42
4. Step 4: Simplify right side
   12,691.45x = 72,449,428.46
5. Step 5: Solve for x
   x = 72,449,428.46/12,691.45
6. Step 6: Final answer
   x = 5,708.52