Finding the Fourth Proportional to 1,818.81, 2,727.72 and 778.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.81 : 2,727.72 = 778.46 : x
2. Step 2: Convert to fraction form
   1,818.81/2,727.72 = 778.46/x
3. Step 3: Cross multiply
   1,818.81x = 2,727.72 × 778.46
4. Step 4: Simplify right side
   1,818.81x = 2,123,407.27
5. Step 5: Solve for x
   x = 2,123,407.27/1,818.81
6. Step 6: Final answer
   x = 1,167.47