Finding the Fourth Proportional to 9,221.49, 12,730.37 and 5,445.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,221.49 : 12,730.37 = 5,445.81 : x
2. Step 2: Convert to fraction form
   9,221.49/12,730.37 = 5,445.81/x
3. Step 3: Cross multiply
   9,221.49x = 12,730.37 × 5,445.81
4. Step 4: Simplify right side
   9,221.49x = 69,327,149.02
5. Step 5: Solve for x
   x = 69,327,149.02/9,221.49
6. Step 6: Final answer
   x = 7,518.00