Finding the Fourth Proportional to 1,345.49, 1,856.65 and 755.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.49 : 1,856.65 = 755.91 : x
2. Step 2: Convert to fraction form
   1,345.49/1,856.65 = 755.91/x
3. Step 3: Cross multiply
   1,345.49x = 1,856.65 × 755.91
4. Step 4: Simplify right side
   1,345.49x = 1,403,460.30
5. Step 5: Solve for x
   x = 1,403,460.30/1,345.49
6. Step 6: Final answer
   x = 1,043.08