Finding the Fourth Proportional to 1,215.04, 1,676.89 and 684.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.04 : 1,676.89 = 684.01 : x
2. Step 2: Convert to fraction form
   1,215.04/1,676.89 = 684.01/x
3. Step 3: Cross multiply
   1,215.04x = 1,676.89 × 684.01
4. Step 4: Simplify right side
   1,215.04x = 1,147,004.44
5. Step 5: Solve for x
   x = 1,147,004.44/1,215.04
6. Step 6: Final answer
   x = 944.01