Finding the Fourth Proportional to 7,215.42, 10,803.20 and 3,697.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,215.42 : 10,803.20 = 3,697.86 : x
2. Step 2: Convert to fraction form
   7,215.42/10,803.20 = 3,697.86/x
3. Step 3: Cross multiply
   7,215.42x = 10,803.20 × 3,697.86
4. Step 4: Simplify right side
   7,215.42x = 39,948,721.15
5. Step 5: Solve for x
   x = 39,948,721.15/7,215.42
6. Step 6: Final answer
   x = 5,536.58