Finding the Fourth Proportional to 1,722.42, 2,376.72 and 976.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.42 : 2,376.72 = 976.38 : x
2. Step 2: Convert to fraction form
   1,722.42/2,376.72 = 976.38/x
3. Step 3: Cross multiply
   1,722.42x = 2,376.72 × 976.38
4. Step 4: Simplify right side
   1,722.42x = 2,320,581.87
5. Step 5: Solve for x
   x = 2,320,581.87/1,722.42
6. Step 6: Final answer
   x = 1,347.28