Finding the Fourth Proportional to 9,891.91, 14,839.34 and 2,871.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,891.91 : 14,839.34 = 2,871.98 : x
2. Step 2: Convert to fraction form
   9,891.91/14,839.34 = 2,871.98/x
3. Step 3: Cross multiply
   9,891.91x = 14,839.34 × 2,871.98
4. Step 4: Simplify right side
   9,891.91x = 42,618,310.43
5. Step 5: Solve for x
   x = 42,618,310.43/9,891.91
6. Step 6: Final answer
   x = 4,308.40