Finding the Fourth Proportional to 7,080.96, 10,611.38 and 5,217.40

Step by Step Solution

1. Step 1: Write the proportion equation
   7,080.96 : 10,611.38 = 5,217.40 : x
2. Step 2: Convert to fraction form
   7,080.96/10,611.38 = 5,217.40/x
3. Step 3: Cross multiply
   7,080.96x = 10,611.38 × 5,217.40
4. Step 4: Simplify right side
   7,080.96x = 55,363,814.01
5. Step 5: Solve for x
   x = 55,363,814.01/7,080.96
6. Step 6: Final answer
   x = 7,818.69