Finding the Fourth Proportional to 1,724.51, 2,379.75 and 938.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.51 : 2,379.75 = 938.56 : x
2. Step 2: Convert to fraction form
   1,724.51/2,379.75 = 938.56/x
3. Step 3: Cross multiply
   1,724.51x = 2,379.75 × 938.56
4. Step 4: Simplify right side
   1,724.51x = 2,233,538.16
5. Step 5: Solve for x
   x = 2,233,538.16/1,724.51
6. Step 6: Final answer
   x = 1,295.17