Finding the Fourth Proportional to 1,345.18, 1,856.32 and 755.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.18 : 1,856.32 = 755.71 : x
2. Step 2: Convert to fraction form
   1,345.18/1,856.32 = 755.71/x
3. Step 3: Cross multiply
   1,345.18x = 1,856.32 × 755.71
4. Step 4: Simplify right side
   1,345.18x = 1,402,839.59
5. Step 5: Solve for x
   x = 1,402,839.59/1,345.18
6. Step 6: Final answer
   x = 1,042.86