Finding the Fourth Proportional to 2,112.49, 2,916.19 and 1,405.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.49 : 2,916.19 = 1,405.59 : x
2. Step 2: Convert to fraction form
   2,112.49/2,916.19 = 1,405.59/x
3. Step 3: Cross multiply
   2,112.49x = 2,916.19 × 1,405.59
4. Step 4: Simplify right side
   2,112.49x = 4,098,958.32
5. Step 5: Solve for x
   x = 4,098,958.32/2,112.49
6. Step 6: Final answer
   x = 1,940.34