Finding the Fourth Proportional to 1,345.59, 1,856.90 and 756.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.59 : 1,856.90 = 756.12 : x
2. Step 2: Convert to fraction form
   1,345.59/1,856.90 = 756.12/x
3. Step 3: Cross multiply
   1,345.59x = 1,856.90 × 756.12
4. Step 4: Simplify right side
   1,345.59x = 1,404,039.23
5. Step 5: Solve for x
   x = 1,404,039.23/1,345.59
6. Step 6: Final answer
   x = 1,043.44