Finding the Third Proportional to 55,800 and 85,005

Step by Step Solution

1. Step 1: Write the proportion equation
   55,800 : 85,005 = 85,005 : x
2. Step 2: Convert to fraction form
   55,800/85,005 = 85,005/x
3. Step 3: Cross multiply
   55,800x = 85,005 × 85,005
4. Step 4: Simplify right side
   55,800x = 7,225,850,025
5. Step 5: Solve for x
   x = 7,225,850,025/55,800
6. Step 6: Final answer
   x = 129,495.52