Finding the Fourth Proportional to 1,724.50, 2,379.81 and 938.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.50 : 2,379.81 = 938.53 : x
2. Step 2: Convert to fraction form
   1,724.50/2,379.81 = 938.53/x
3. Step 3: Cross multiply
   1,724.50x = 2,379.81 × 938.53
4. Step 4: Simplify right side
   1,724.50x = 2,233,529.57
5. Step 5: Solve for x
   x = 2,233,529.57/1,724.50
6. Step 6: Final answer
   x = 1,295.17