Finding the Fourth Proportional to 3,123.40, 4,671.60 and 2,796.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.40 : 4,671.60 = 2,796.70 : x
2. Step 2: Convert to fraction form
   3,123.40/4,671.60 = 2,796.70/x
3. Step 3: Cross multiply
   3,123.40x = 4,671.60 × 2,796.70
4. Step 4: Simplify right side
   3,123.40x = 13,065,063.72
5. Step 5: Solve for x
   x = 13,065,063.72/3,123.40
6. Step 6: Final answer
   x = 4,182.96