Finding the Fourth Proportional to 1,345.68, 1,857.09 and 756.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.68 : 1,857.09 = 756.36 : x
2. Step 2: Convert to fraction form
   1,345.68/1,857.09 = 756.36/x
3. Step 3: Cross multiply
   1,345.68x = 1,857.09 × 756.36
4. Step 4: Simplify right side
   1,345.68x = 1,404,628.59
5. Step 5: Solve for x
   x = 1,404,628.59/1,345.68
6. Step 6: Final answer
   x = 1,043.81