Finding the Fourth Proportional to 2,872.06, 3,962.72 and 1,613.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,872.06 : 3,962.72 = 1,613.15 : x
2. Step 2: Convert to fraction form
   2,872.06/3,962.72 = 1,613.15/x
3. Step 3: Cross multiply
   2,872.06x = 3,962.72 × 1,613.15
4. Step 4: Simplify right side
   2,872.06x = 6,392,461.77
5. Step 5: Solve for x
   x = 6,392,461.77/2,872.06
6. Step 6: Final answer
   x = 2,225.74