Finding the Fourth Proportional to 1,290.34, 1,780.41 and 793.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.34 : 1,780.41 = 793.06 : x
2. Step 2: Convert to fraction form
   1,290.34/1,780.41 = 793.06/x
3. Step 3: Cross multiply
   1,290.34x = 1,780.41 × 793.06
4. Step 4: Simplify right side
   1,290.34x = 1,411,971.95
5. Step 5: Solve for x
   x = 1,411,971.95/1,290.34
6. Step 6: Final answer
   x = 1,094.26