Finding the Fourth Proportional to 9,131.10, 13,698.71 and 2,891.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.10 : 13,698.71 = 2,891.49 : x
2. Step 2: Convert to fraction form
   9,131.10/13,698.71 = 2,891.49/x
3. Step 3: Cross multiply
   9,131.10x = 13,698.71 × 2,891.49
4. Step 4: Simplify right side
   9,131.10x = 39,609,682.98
5. Step 5: Solve for x
   x = 39,609,682.98/9,131.10
6. Step 6: Final answer
   x = 4,337.89