Finding the Fourth Proportional to 9,409.42, 12,985.05 and 5,217.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,409.42 : 12,985.05 = 5,217.67 : x
2. Step 2: Convert to fraction form
   9,409.42/12,985.05 = 5,217.67/x
3. Step 3: Cross multiply
   9,409.42x = 12,985.05 × 5,217.67
4. Step 4: Simplify right side
   9,409.42x = 67,751,705.83
5. Step 5: Solve for x
   x = 67,751,705.83/9,409.42
6. Step 6: Final answer
   x = 7,200.41