Finding the Fourth Proportional to 1,176.61, 1,623.89 and 679.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,176.61 : 1,623.89 = 679.15 : x
2. Step 2: Convert to fraction form
   1,176.61/1,623.89 = 679.15/x
3. Step 3: Cross multiply
   1,176.61x = 1,623.89 × 679.15
4. Step 4: Simplify right side
   1,176.61x = 1,102,864.89
5. Step 5: Solve for x
   x = 1,102,864.89/1,176.61
6. Step 6: Final answer
   x = 937.32