Finding the Fourth Proportional to 2,176.50, 3,265.74 and 877.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.50 : 3,265.74 = 877.72 : x
2. Step 2: Convert to fraction form
   2,176.50/3,265.74 = 877.72/x
3. Step 3: Cross multiply
   2,176.50x = 3,265.74 × 877.72
4. Step 4: Simplify right side
   2,176.50x = 2,866,405.31
5. Step 5: Solve for x
   x = 2,866,405.31/2,176.50
6. Step 6: Final answer
   x = 1,316.98