Finding the Fourth Proportional to 1,174.15, 1,619.90 and 676.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.15 : 1,619.90 = 676.91 : x
2. Step 2: Convert to fraction form
   1,174.15/1,619.90 = 676.91/x
3. Step 3: Cross multiply
   1,174.15x = 1,619.90 × 676.91
4. Step 4: Simplify right side
   1,174.15x = 1,096,520.60
5. Step 5: Solve for x
   x = 1,096,520.60/1,174.15
6. Step 6: Final answer
   x = 933.89