Finding the Fourth Proportional to 1,345.04, 1,856.28 and 755.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.04 : 1,856.28 = 755.78 : x
2. Step 2: Convert to fraction form
   1,345.04/1,856.28 = 755.78/x
3. Step 3: Cross multiply
   1,345.04x = 1,856.28 × 755.78
4. Step 4: Simplify right side
   1,345.04x = 1,402,939.30
5. Step 5: Solve for x
   x = 1,402,939.30/1,345.04
6. Step 6: Final answer
   x = 1,043.05