Finding the Fourth Proportional to 1,174.67, 1,621.05 and 677.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.67 : 1,621.05 = 677.31 : x
2. Step 2: Convert to fraction form
   1,174.67/1,621.05 = 677.31/x
3. Step 3: Cross multiply
   1,174.67x = 1,621.05 × 677.31
4. Step 4: Simplify right side
   1,174.67x = 1,097,953.38
5. Step 5: Solve for x
   x = 1,097,953.38/1,174.67
6. Step 6: Final answer
   x = 934.69