Finding the Fourth Proportional to 1,648.72, 2,473.58 and 723.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.72 : 2,473.58 = 723.84 : x
2. Step 2: Convert to fraction form
   1,648.72/2,473.58 = 723.84/x
3. Step 3: Cross multiply
   1,648.72x = 2,473.58 × 723.84
4. Step 4: Simplify right side
   1,648.72x = 1,790,476.15
5. Step 5: Solve for x
   x = 1,790,476.15/1,648.72
6. Step 6: Final answer
   x = 1,085.98