Finding the Fourth Proportional to 8,477.74, 12,709.72 and 7,321.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,477.74 : 12,709.72 = 7,321.47 : x
2. Step 2: Convert to fraction form
   8,477.74/12,709.72 = 7,321.47/x
3. Step 3: Cross multiply
   8,477.74x = 12,709.72 × 7,321.47
4. Step 4: Simplify right side
   8,477.74x = 93,053,833.69
5. Step 5: Solve for x
   x = 93,053,833.69/8,477.74
6. Step 6: Final answer
   x = 10,976.25