Finding the Fourth Proportional to 9,783.50, 13,491.30 and 8,371.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,783.50 : 13,491.30 = 8,371.88 : x
2. Step 2: Convert to fraction form
   9,783.50/13,491.30 = 8,371.88/x
3. Step 3: Cross multiply
   9,783.50x = 13,491.30 × 8,371.88
4. Step 4: Simplify right side
   9,783.50x = 112,947,477.19
5. Step 5: Solve for x
   x = 112,947,477.19/9,783.50
6. Step 6: Final answer
   x = 11,544.70