Finding the Fourth Proportional to 1,722.15, 2,376.69 and 976.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.15 : 2,376.69 = 976.05 : x
2. Step 2: Convert to fraction form
   1,722.15/2,376.69 = 976.05/x
3. Step 3: Cross multiply
   1,722.15x = 2,376.69 × 976.05
4. Step 4: Simplify right side
   1,722.15x = 2,319,768.27
5. Step 5: Solve for x
   x = 2,319,768.27/1,722.15
6. Step 6: Final answer
   x = 1,347.02