Finding the Third Proportional to 61,200 and 90,666

Step by Step Solution

1. Step 1: Write the proportion equation
   61,200 : 90,666 = 90,666 : x
2. Step 2: Convert to fraction form
   61,200/90,666 = 90,666/x
3. Step 3: Cross multiply
   61,200x = 90,666 × 90,666
4. Step 4: Simplify right side
   61,200x = 8,220,323,556
5. Step 5: Solve for x
   x = 8,220,323,556/61,200
6. Step 6: Final answer
   x = 134,319.01