Finding the Fourth Proportional to 3,716.91, 5,128.23 and 2,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,716.91 : 5,128.23 = 2,123.50 : x
2. Step 2: Convert to fraction form
   3,716.91/5,128.23 = 2,123.50/x
3. Step 3: Cross multiply
   3,716.91x = 5,128.23 × 2,123.50
4. Step 4: Simplify right side
   3,716.91x = 10,889,796.41
5. Step 5: Solve for x
   x = 10,889,796.41/3,716.91
6. Step 6: Final answer
   x = 2,929.80