Finding the Fourth Proportional to 1,676.76, 2,314.12 and 1,211.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.76 : 2,314.12 = 1,211.28 : x
2. Step 2: Convert to fraction form
   1,676.76/2,314.12 = 1,211.28/x
3. Step 3: Cross multiply
   1,676.76x = 2,314.12 × 1,211.28
4. Step 4: Simplify right side
   1,676.76x = 2,803,047.27
5. Step 5: Solve for x
   x = 2,803,047.27/1,676.76
6. Step 6: Final answer
   x = 1,671.70