Finding the Third Proportional to 52,912 and 85,072

Step by Step Solution

1. Step 1: Write the proportion equation
   52,912 : 85,072 = 85,072 : x
2. Step 2: Convert to fraction form
   52,912/85,072 = 85,072/x
3. Step 3: Cross multiply
   52,912x = 85,072 × 85,072
4. Step 4: Simplify right side
   52,912x = 7,237,245,184
5. Step 5: Solve for x
   x = 7,237,245,184/52,912
6. Step 6: Final answer
   x = 136,778.90