Finding the Fourth Proportional to 1,345.96, 1,857.36 and 756.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.96 : 1,857.36 = 756.55 : x
2. Step 2: Convert to fraction form
   1,345.96/1,857.36 = 756.55/x
3. Step 3: Cross multiply
   1,345.96x = 1,857.36 × 756.55
4. Step 4: Simplify right side
   1,345.96x = 1,405,185.71
5. Step 5: Solve for x
   x = 1,405,185.71/1,345.96
6. Step 6: Final answer
   x = 1,044.00