Finding the Fourth Proportional to 2,123.29, 2,929.80 and 1,338.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.29 : 2,929.80 = 1,338.40 : x
2. Step 2: Convert to fraction form
   2,123.29/2,929.80 = 1,338.40/x
3. Step 3: Cross multiply
   2,123.29x = 2,929.80 × 1,338.40
4. Step 4: Simplify right side
   2,123.29x = 3,921,244.32
5. Step 5: Solve for x
   x = 3,921,244.32/2,123.29
6. Step 6: Final answer
   x = 1,846.78