Finding the Fourth Proportional to 1,074.84, 1,485.18 and 843.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.84 : 1,485.18 = 843.72 : x
2. Step 2: Convert to fraction form
   1,074.84/1,485.18 = 843.72/x
3. Step 3: Cross multiply
   1,074.84x = 1,485.18 × 843.72
4. Step 4: Simplify right side
   1,074.84x = 1,253,076.07
5. Step 5: Solve for x
   x = 1,253,076.07/1,074.84
6. Step 6: Final answer
   x = 1,165.83