Finding the Fourth Proportional to 1,345.45, 1,856.71 and 755.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.45 : 1,856.71 = 755.98 : x
2. Step 2: Convert to fraction form
   1,345.45/1,856.71 = 755.98/x
3. Step 3: Cross multiply
   1,345.45x = 1,856.71 × 755.98
4. Step 4: Simplify right side
   1,345.45x = 1,403,641.31
5. Step 5: Solve for x
   x = 1,403,641.31/1,345.45
6. Step 6: Final answer
   x = 1,043.25