Finding the Fourth Proportional to 8,412.72, 12,595.32 and 4,455

Step by Step Solution

1. Step 1: Write the proportion equation
   8,412.72 : 12,595.32 = 4,455 : x
2. Step 2: Convert to fraction form
   8,412.72/12,595.32 = 4,455/x
3. Step 3: Cross multiply
   8,412.72x = 12,595.32 × 4,455
4. Step 4: Simplify right side
   8,412.72x = 56,112,150.60
5. Step 5: Solve for x
   x = 56,112,150.60/8,412.72
6. Step 6: Final answer
   x = 6,669.92