Finding the Fourth Proportional to 1,290.69, 1,780.32 and 793.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.69 : 1,780.32 = 793.17 : x
2. Step 2: Convert to fraction form
   1,290.69/1,780.32 = 793.17/x
3. Step 3: Cross multiply
   1,290.69x = 1,780.32 × 793.17
4. Step 4: Simplify right side
   1,290.69x = 1,412,096.41
5. Step 5: Solve for x
   x = 1,412,096.41/1,290.69
6. Step 6: Final answer
   x = 1,094.06