Finding the Fourth Proportional to 1,345.23, 1,856.51 and 755.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.23 : 1,856.51 = 755.81 : x
2. Step 2: Convert to fraction form
   1,345.23/1,856.51 = 755.81/x
3. Step 3: Cross multiply
   1,345.23x = 1,856.51 × 755.81
4. Step 4: Simplify right side
   1,345.23x = 1,403,155.76
5. Step 5: Solve for x
   x = 1,403,155.76/1,345.23
6. Step 6: Final answer
   x = 1,043.06