Finding the Fourth Proportional to 1,345.44, 1,856.72 and 756

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.44 : 1,856.72 = 756 : x
2. Step 2: Convert to fraction form
   1,345.44/1,856.72 = 756/x
3. Step 3: Cross multiply
   1,345.44x = 1,856.72 × 756
4. Step 4: Simplify right side
   1,345.44x = 1,403,680.32
5. Step 5: Solve for x
   x = 1,403,680.32/1,345.44
6. Step 6: Final answer
   x = 1,043.29