Finding the Fourth Proportional to 1,722.69, 2,377.38 and 976.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.69 : 2,377.38 = 976.72 : x
2. Step 2: Convert to fraction form
   1,722.69/2,377.38 = 976.72/x
3. Step 3: Cross multiply
   1,722.69x = 2,377.38 × 976.72
4. Step 4: Simplify right side
   1,722.69x = 2,322,034.59
5. Step 5: Solve for x
   x = 2,322,034.59/1,722.69
6. Step 6: Final answer
   x = 1,347.91