Finding the Fourth Proportional to 1,178.76, 1,626.83 and 674.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.76 : 1,626.83 = 674.80 : x
2. Step 2: Convert to fraction form
   1,178.76/1,626.83 = 674.80/x
3. Step 3: Cross multiply
   1,178.76x = 1,626.83 × 674.80
4. Step 4: Simplify right side
   1,178.76x = 1,097,779.02
5. Step 5: Solve for x
   x = 1,097,779.02/1,178.76
6. Step 6: Final answer
   x = 931.30