Finding the Fourth Proportional to 3,716.74, 5,128.88 and 2,123.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,716.74 : 5,128.88 = 2,123.56 : x
2. Step 2: Convert to fraction form
   3,716.74/5,128.88 = 2,123.56/x
3. Step 3: Cross multiply
   3,716.74x = 5,128.88 × 2,123.56
4. Step 4: Simplify right side
   3,716.74x = 10,891,484.41
5. Step 5: Solve for x
   x = 10,891,484.41/3,716.74
6. Step 6: Final answer
   x = 2,930.39