Finding the Third Proportional to 59,980 and 85,442

Step by Step Solution

1. Step 1: Write the proportion equation
   59,980 : 85,442 = 85,442 : x
2. Step 2: Convert to fraction form
   59,980/85,442 = 85,442/x
3. Step 3: Cross multiply
   59,980x = 85,442 × 85,442
4. Step 4: Simplify right side
   59,980x = 7,300,335,364
5. Step 5: Solve for x
   x = 7,300,335,364/59,980
6. Step 6: Final answer
   x = 121,712.83