Finding the Fourth Proportional to 1,345.99, 1,857.50 and 756.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.99 : 1,857.50 = 756.57 : x
2. Step 2: Convert to fraction form
   1,345.99/1,857.50 = 756.57/x
3. Step 3: Cross multiply
   1,345.99x = 1,857.50 × 756.57
4. Step 4: Simplify right side
   1,345.99x = 1,405,328.78
5. Step 5: Solve for x
   x = 1,405,328.78/1,345.99
6. Step 6: Final answer
   x = 1,044.09