Finding the Fourth Proportional to 1,456.10, 2,172.96 and 1,300.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.10 : 2,172.96 = 1,300.40 : x
2. Step 2: Convert to fraction form
   1,456.10/2,172.96 = 1,300.40/x
3. Step 3: Cross multiply
   1,456.10x = 2,172.96 × 1,300.40
4. Step 4: Simplify right side
   1,456.10x = 2,825,725.87
5. Step 5: Solve for x
   x = 2,825,725.87/1,456.10
6. Step 6: Final answer
   x = 1,940.61