Finding the Fourth Proportional to 9,782.96, 13,490.53 and 8,371.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,782.96 : 13,490.53 = 8,371.31 : x
2. Step 2: Convert to fraction form
   9,782.96/13,490.53 = 8,371.31/x
3. Step 3: Cross multiply
   9,782.96x = 13,490.53 × 8,371.31
4. Step 4: Simplify right side
   9,782.96x = 112,933,421.49
5. Step 5: Solve for x
   x = 112,933,421.49/9,782.96
6. Step 6: Final answer
   x = 11,543.90