Finding the Fourth Proportional to 9,783.76, 13,501.36 and 5,591.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,783.76 : 13,501.36 = 5,591.76 : x
2. Step 2: Convert to fraction form
   9,783.76/13,501.36 = 5,591.76/x
3. Step 3: Cross multiply
   9,783.76x = 13,501.36 × 5,591.76
4. Step 4: Simplify right side
   9,783.76x = 75,496,364.79
5. Step 5: Solve for x
   x = 75,496,364.79/9,783.76
6. Step 6: Final answer
   x = 7,716.50