Finding the Fourth Proportional to 1,345.86, 1,857.29 and 756.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.86 : 1,857.29 = 756.39 : x
2. Step 2: Convert to fraction form
   1,345.86/1,857.29 = 756.39/x
3. Step 3: Cross multiply
   1,345.86x = 1,857.29 × 756.39
4. Step 4: Simplify right side
   1,345.86x = 1,404,831.80
5. Step 5: Solve for x
   x = 1,404,831.80/1,345.86
6. Step 6: Final answer
   x = 1,043.82