Finding the Fourth Proportional to 1,290.76, 1,780.37 and 793.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.76 : 1,780.37 = 793.56 : x
2. Step 2: Convert to fraction form
   1,290.76/1,780.37 = 793.56/x
3. Step 3: Cross multiply
   1,290.76x = 1,780.37 × 793.56
4. Step 4: Simplify right side
   1,290.76x = 1,412,830.42
5. Step 5: Solve for x
   x = 1,412,830.42/1,290.76
6. Step 6: Final answer
   x = 1,094.57