Finding the Fourth Proportional to 1,814.94, 2,502.90 and 1,218.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,814.94 : 2,502.90 = 1,218.78 : x
2. Step 2: Convert to fraction form
   1,814.94/2,502.90 = 1,218.78/x
3. Step 3: Cross multiply
   1,814.94x = 2,502.90 × 1,218.78
4. Step 4: Simplify right side
   1,814.94x = 3,050,484.46
5. Step 5: Solve for x
   x = 3,050,484.46/1,814.94
6. Step 6: Final answer
   x = 1,680.76