Finding the Fourth Proportional to 7,800.96, 11,701.59 and 3,639.83

Step by Step Solution

1. Step 1: Write the proportion equation
   7,800.96 : 11,701.59 = 3,639.83 : x
2. Step 2: Convert to fraction form
   7,800.96/11,701.59 = 3,639.83/x
3. Step 3: Cross multiply
   7,800.96x = 11,701.59 × 3,639.83
4. Step 4: Simplify right side
   7,800.96x = 42,591,809.38
5. Step 5: Solve for x
   x = 42,591,809.38/7,800.96
6. Step 6: Final answer
   x = 5,459.82