Finding the Fourth Proportional to 2,615.88, 3,920.22 and 970.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.88 : 3,920.22 = 970.82 : x
2. Step 2: Convert to fraction form
   2,615.88/3,920.22 = 970.82/x
3. Step 3: Cross multiply
   2,615.88x = 3,920.22 × 970.82
4. Step 4: Simplify right side
   2,615.88x = 3,805,827.98
5. Step 5: Solve for x
   x = 3,805,827.98/2,615.88
6. Step 6: Final answer
   x = 1,454.89