Finding the Fourth Proportional to 1,346.20, 1,857.72 and 756.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.20 : 1,857.72 = 756.86 : x
2. Step 2: Convert to fraction form
   1,346.20/1,857.72 = 756.86/x
3. Step 3: Cross multiply
   1,346.20x = 1,857.72 × 756.86
4. Step 4: Simplify right side
   1,346.20x = 1,406,033.96
5. Step 5: Solve for x
   x = 1,406,033.96/1,346.20
6. Step 6: Final answer
   x = 1,044.45