Finding the Fourth Proportional to 1,290.34, 1,776.81 and 1,093.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.34 : 1,776.81 = 1,093.42 : x
2. Step 2: Convert to fraction form
   1,290.34/1,776.81 = 1,093.42/x
3. Step 3: Cross multiply
   1,290.34x = 1,776.81 × 1,093.42
4. Step 4: Simplify right side
   1,290.34x = 1,942,799.59
5. Step 5: Solve for x
   x = 1,942,799.59/1,290.34
6. Step 6: Final answer
   x = 1,505.65