Finding the Fourth Proportional to 1,345.09, 1,856.25 and 755.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.09 : 1,856.25 = 755.63 : x
2. Step 2: Convert to fraction form
   1,345.09/1,856.25 = 755.63/x
3. Step 3: Cross multiply
   1,345.09x = 1,856.25 × 755.63
4. Step 4: Simplify right side
   1,345.09x = 1,402,635.87
5. Step 5: Solve for x
   x = 1,402,635.87/1,345.09
6. Step 6: Final answer
   x = 1,042.78