Finding the Fourth Proportional to 1,345.42, 1,856.48 and 755.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.42 : 1,856.48 = 755.86 : x
2. Step 2: Convert to fraction form
   1,345.42/1,856.48 = 755.86/x
3. Step 3: Cross multiply
   1,345.42x = 1,856.48 × 755.86
4. Step 4: Simplify right side
   1,345.42x = 1,403,238.97
5. Step 5: Solve for x
   x = 1,403,238.97/1,345.42
6. Step 6: Final answer
   x = 1,042.97