Finding the Fourth Proportional to 1,346.16, 1,857.78 and 756.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.16 : 1,857.78 = 756.72 : x
2. Step 2: Convert to fraction form
   1,346.16/1,857.78 = 756.72/x
3. Step 3: Cross multiply
   1,346.16x = 1,857.78 × 756.72
4. Step 4: Simplify right side
   1,346.16x = 1,405,819.28
5. Step 5: Solve for x
   x = 1,405,819.28/1,346.16
6. Step 6: Final answer
   x = 1,044.32