Finding the Fourth Proportional to 1,648.38, 2,471.70 and 723.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.38 : 2,471.70 = 723.45 : x
2. Step 2: Convert to fraction form
   1,648.38/2,471.70 = 723.45/x
3. Step 3: Cross multiply
   1,648.38x = 2,471.70 × 723.45
4. Step 4: Simplify right side
   1,648.38x = 1,788,151.37
5. Step 5: Solve for x
   x = 1,788,151.37/1,648.38
6. Step 6: Final answer
   x = 1,084.79