Finding the Fourth Proportional to 1,345.68, 1,856.88 and 756.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.68 : 1,856.88 = 756.24 : x
2. Step 2: Convert to fraction form
   1,345.68/1,856.88 = 756.24/x
3. Step 3: Cross multiply
   1,345.68x = 1,856.88 × 756.24
4. Step 4: Simplify right side
   1,345.68x = 1,404,246.93
5. Step 5: Solve for x
   x = 1,404,246.93/1,345.68
6. Step 6: Final answer
   x = 1,043.52