Finding the Fourth Proportional to 1,722.09, 2,376.91 and 976.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.09 : 2,376.91 = 976.49 : x
2. Step 2: Convert to fraction form
   1,722.09/2,376.91 = 976.49/x
3. Step 3: Cross multiply
   1,722.09x = 2,376.91 × 976.49
4. Step 4: Simplify right side
   1,722.09x = 2,321,027.10
5. Step 5: Solve for x
   x = 2,321,027.10/1,722.09
6. Step 6: Final answer
   x = 1,347.79