Finding the Fourth Proportional to 1,345.74, 1,857.18 and 756.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.74 : 1,857.18 = 756.29 : x
2. Step 2: Convert to fraction form
   1,345.74/1,857.18 = 756.29/x
3. Step 3: Cross multiply
   1,345.74x = 1,857.18 × 756.29
4. Step 4: Simplify right side
   1,345.74x = 1,404,557.38
5. Step 5: Solve for x
   x = 1,404,557.38/1,345.74
6. Step 6: Final answer
   x = 1,043.71