Finding the Fourth Proportional to 2,071.86, 2,861.64 and 1,511.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.86 : 2,861.64 = 1,511.43 : x
2. Step 2: Convert to fraction form
   2,071.86/2,861.64 = 1,511.43/x
3. Step 3: Cross multiply
   2,071.86x = 2,861.64 × 1,511.43
4. Step 4: Simplify right side
   2,071.86x = 4,325,168.55
5. Step 5: Solve for x
   x = 4,325,168.55/2,071.86
6. Step 6: Final answer
   x = 2,087.58