Finding the Fourth Proportional to 2,156.94, 2,976.66 and 1,212.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.94 : 2,976.66 = 1,212.84 : x
2. Step 2: Convert to fraction form
   2,156.94/2,976.66 = 1,212.84/x
3. Step 3: Cross multiply
   2,156.94x = 2,976.66 × 1,212.84
4. Step 4: Simplify right side
   2,156.94x = 3,610,212.31
5. Step 5: Solve for x
   x = 3,610,212.31/2,156.94
6. Step 6: Final answer
   x = 1,673.77