Finding the Fourth Proportional to 1,506.78, 2,079.30 and 843.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,506.78 : 2,079.30 = 843.61 : x
2. Step 2: Convert to fraction form
   1,506.78/2,079.30 = 843.61/x
3. Step 3: Cross multiply
   1,506.78x = 2,079.30 × 843.61
4. Step 4: Simplify right side
   1,506.78x = 1,754,118.27
5. Step 5: Solve for x
   x = 1,754,118.27/1,506.78
6. Step 6: Final answer
   x = 1,164.15