Finding the Fourth Proportional to 2,123.40, 2,928.96 and 1,336.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.40 : 2,928.96 = 1,336.08 : x
2. Step 2: Convert to fraction form
   2,123.40/2,928.96 = 1,336.08/x
3. Step 3: Cross multiply
   2,123.40x = 2,928.96 × 1,336.08
4. Step 4: Simplify right side
   2,123.40x = 3,913,324.88
5. Step 5: Solve for x
   x = 3,913,324.88/2,123.40
6. Step 6: Final answer
   x = 1,842.95