Finding the Fourth Proportional to 1,964.78, 2,710.72 and 1,218.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,964.78 : 2,710.72 = 1,218.47 : x
2. Step 2: Convert to fraction form
   1,964.78/2,710.72 = 1,218.47/x
3. Step 3: Cross multiply
   1,964.78x = 2,710.72 × 1,218.47
4. Step 4: Simplify right side
   1,964.78x = 3,302,911.35
5. Step 5: Solve for x
   x = 3,302,911.35/1,964.78
6. Step 6: Final answer
   x = 1,681.06