Finding the Third Proportional to 5,558.63 and 8,155.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,558.63 : 8,155.69 = 8,155.69 : x
2. Step 2: Convert to fraction form
   5,558.63/8,155.69 = 8,155.69/x
3. Step 3: Cross multiply
   5,558.63x = 8,155.69 × 8,155.69
4. Step 4: Simplify right side
   5,558.63x = 66,515,238.60
5. Step 5: Solve for x
   x = 66,515,238.60/5,558.63
6. Step 6: Final answer
   x = 11,966.13