Finding the Fourth Proportional to 9,221.73, 12,725.28 and 5,685

Step by Step Solution

1. Step 1: Write the proportion equation
   9,221.73 : 12,725.28 = 5,685 : x
2. Step 2: Convert to fraction form
   9,221.73/12,725.28 = 5,685/x
3. Step 3: Cross multiply
   9,221.73x = 12,725.28 × 5,685
4. Step 4: Simplify right side
   9,221.73x = 72,343,216.80
5. Step 5: Solve for x
   x = 72,343,216.80/9,221.73
6. Step 6: Final answer
   x = 7,844.86