Finding the Fourth Proportional to 9,871.68, 14,808.50 and 2,851.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.68 : 14,808.50 = 2,851.86 : x
2. Step 2: Convert to fraction form
   9,871.68/14,808.50 = 2,851.86/x
3. Step 3: Cross multiply
   9,871.68x = 14,808.50 × 2,851.86
4. Step 4: Simplify right side
   9,871.68x = 42,231,754.55
5. Step 5: Solve for x
   x = 42,231,754.55/9,871.68
6. Step 6: Final answer
   x = 4,278.07