Finding the Fourth Proportional to 1,345.04, 1,856.20 and 755.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.04 : 1,856.20 = 755.56 : x
2. Step 2: Convert to fraction form
   1,345.04/1,856.20 = 755.56/x
3. Step 3: Cross multiply
   1,345.04x = 1,856.20 × 755.56
4. Step 4: Simplify right side
   1,345.04x = 1,402,470.47
5. Step 5: Solve for x
   x = 1,402,470.47/1,345.04
6. Step 6: Final answer
   x = 1,042.70