Finding the Fourth Proportional to 1,345.73, 1,857.29 and 756.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.73 : 1,857.29 = 756.30 : x
2. Step 2: Convert to fraction form
   1,345.73/1,857.29 = 756.30/x
3. Step 3: Cross multiply
   1,345.73x = 1,857.29 × 756.30
4. Step 4: Simplify right side
   1,345.73x = 1,404,668.43
5. Step 5: Solve for x
   x = 1,404,668.43/1,345.73
6. Step 6: Final answer
   x = 1,043.80