Finding the Fourth Proportional to 2,612.34, 3,920.76 and 970.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.34 : 3,920.76 = 970.38 : x
2. Step 2: Convert to fraction form
   2,612.34/3,920.76 = 970.38/x
3. Step 3: Cross multiply
   2,612.34x = 3,920.76 × 970.38
4. Step 4: Simplify right side
   2,612.34x = 3,804,627.09
5. Step 5: Solve for x
   x = 3,804,627.09/2,612.34
6. Step 6: Final answer
   x = 1,456.41