Finding the Fourth Proportional to 1,723.98, 2,379.12 and 938.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,723.98 : 2,379.12 = 938.07 : x
2. Step 2: Convert to fraction form
   1,723.98/2,379.12 = 938.07/x
3. Step 3: Cross multiply
   1,723.98x = 2,379.12 × 938.07
4. Step 4: Simplify right side
   1,723.98x = 2,231,781.10
5. Step 5: Solve for x
   x = 2,231,781.10/1,723.98
6. Step 6: Final answer
   x = 1,294.55