Finding the Third Proportional to 52,890 and 85,039

Step by Step Solution

1. Step 1: Write the proportion equation
   52,890 : 85,039 = 85,039 : x
2. Step 2: Convert to fraction form
   52,890/85,039 = 85,039/x
3. Step 3: Cross multiply
   52,890x = 85,039 × 85,039
4. Step 4: Simplify right side
   52,890x = 7,231,631,521
5. Step 5: Solve for x
   x = 7,231,631,521/52,890
6. Step 6: Final answer
   x = 136,729.66