Finding the Fourth Proportional to 2,613.31, 3,919.86 and 970.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.31 : 3,919.86 = 970.18 : x
2. Step 2: Convert to fraction form
   2,613.31/3,919.86 = 970.18/x
3. Step 3: Cross multiply
   2,613.31x = 3,919.86 × 970.18
4. Step 4: Simplify right side
   2,613.31x = 3,802,959.98
5. Step 5: Solve for x
   x = 3,802,959.98/2,613.31
6. Step 6: Final answer
   x = 1,455.23