Finding the Fourth Proportional to 2,871.65, 4,272.52 and 2,861.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871.65 : 4,272.52 = 2,861.93 : x
2. Step 2: Convert to fraction form
   2,871.65/4,272.52 = 2,861.93/x
3. Step 3: Cross multiply
   2,871.65x = 4,272.52 × 2,861.93
4. Step 4: Simplify right side
   2,871.65x = 12,227,653.16
5. Step 5: Solve for x
   x = 12,227,653.16/2,871.65
6. Step 6: Final answer
   x = 4,258.06