Finding the Fourth Proportional to 1,908.82, 2,634.33 and 1,211.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,908.82 : 2,634.33 = 1,211.86 : x
2. Step 2: Convert to fraction form
   1,908.82/2,634.33 = 1,211.86/x
3. Step 3: Cross multiply
   1,908.82x = 2,634.33 × 1,211.86
4. Step 4: Simplify right side
   1,908.82x = 3,192,439.15
5. Step 5: Solve for x
   x = 3,192,439.15/1,908.82
6. Step 6: Final answer
   x = 1,672.47