Finding the Fourth Proportional to 2,100.34, 2,898.98 and 1,216

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.34 : 2,898.98 = 1,216 : x
2. Step 2: Convert to fraction form
   2,100.34/2,898.98 = 1,216/x
3. Step 3: Cross multiply
   2,100.34x = 2,898.98 × 1,216
4. Step 4: Simplify right side
   2,100.34x = 3,525,159.68
5. Step 5: Solve for x
   x = 3,525,159.68/2,100.34
6. Step 6: Final answer
   x = 1,678.38