Finding the Third Proportional to 52,870 and 77,320

Step by Step Solution

1. Step 1: Write the proportion equation
   52,870 : 77,320 = 77,320 : x
2. Step 2: Convert to fraction form
   52,870/77,320 = 77,320/x
3. Step 3: Cross multiply
   52,870x = 77,320 × 77,320
4. Step 4: Simplify right side
   52,870x = 5,978,382,400
5. Step 5: Solve for x
   x = 5,978,382,400/52,870
6. Step 6: Final answer
   x = 113,077.03