Finding the Fourth Proportional to 7,817.98, 11,727.12 and 3,655.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,817.98 : 11,727.12 = 3,655.69 : x
2. Step 2: Convert to fraction form
   7,817.98/11,727.12 = 3,655.69/x
3. Step 3: Cross multiply
   7,817.98x = 11,727.12 × 3,655.69
4. Step 4: Simplify right side
   7,817.98x = 42,870,715.31
5. Step 5: Solve for x
   x = 42,870,715.31/7,817.98
6. Step 6: Final answer
   x = 5,483.61