Finding the Fourth Proportional to 1,913.82, 2,870.25 and 818.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.82 : 2,870.25 = 818.07 : x
2. Step 2: Convert to fraction form
   1,913.82/2,870.25 = 818.07/x
3. Step 3: Cross multiply
   1,913.82x = 2,870.25 × 818.07
4. Step 4: Simplify right side
   1,913.82x = 2,348,065.42
5. Step 5: Solve for x
   x = 2,348,065.42/1,913.82
6. Step 6: Final answer
   x = 1,226.90