Finding the Fourth Proportional to 1,964.31, 2,710.07 and 1,218.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,964.31 : 2,710.07 = 1,218.00 : x
2. Step 2: Convert to fraction form
   1,964.31/2,710.07 = 1,218.00/x
3. Step 3: Cross multiply
   1,964.31x = 2,710.07 × 1,218.00
4. Step 4: Simplify right side
   1,964.31x = 3,300,852.81
5. Step 5: Solve for x
   x = 3,300,852.81/1,964.31
6. Step 6: Final answer
   x = 1,680.42