Finding the Fourth Proportional to 2,156.84, 2,976.18 and 1,212.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.84 : 2,976.18 = 1,212.48 : x
2. Step 2: Convert to fraction form
   2,156.84/2,976.18 = 1,212.48/x
3. Step 3: Cross multiply
   2,156.84x = 2,976.18 × 1,212.48
4. Step 4: Simplify right side
   2,156.84x = 3,608,558.73
5. Step 5: Solve for x
   x = 3,608,558.73/2,156.84
6. Step 6: Final answer
   x = 1,673.08