Finding the Fourth Proportional to 1,814.31, 2,504.52 and 1,217.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,814.31 : 2,504.52 = 1,217.70 : x
2. Step 2: Convert to fraction form
   1,814.31/2,504.52 = 1,217.70/x
3. Step 3: Cross multiply
   1,814.31x = 2,504.52 × 1,217.70
4. Step 4: Simplify right side
   1,814.31x = 3,049,754.00
5. Step 5: Solve for x
   x = 3,049,754.00/1,814.31
6. Step 6: Final answer
   x = 1,680.94