Finding the Fourth Proportional to 1,628.72, 2,249.60 and 1,185.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.72 : 2,249.60 = 1,185.92 : x
2. Step 2: Convert to fraction form
   1,628.72/2,249.60 = 1,185.92/x
3. Step 3: Cross multiply
   1,628.72x = 2,249.60 × 1,185.92
4. Step 4: Simplify right side
   1,628.72x = 2,667,845.63
5. Step 5: Solve for x
   x = 2,667,845.63/1,628.72
6. Step 6: Final answer
   x = 1,638.00