Finding the Fourth Proportional to 1,345.87, 1,857.45 and 756.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.87 : 1,857.45 = 756.37 : x
2. Step 2: Convert to fraction form
   1,345.87/1,857.45 = 756.37/x
3. Step 3: Cross multiply
   1,345.87x = 1,857.45 × 756.37
4. Step 4: Simplify right side
   1,345.87x = 1,404,919.46
5. Step 5: Solve for x
   x = 1,404,919.46/1,345.87
6. Step 6: Final answer
   x = 1,043.87