Finding the Third Proportional to 28,866 and 64,290

Step by Step Solution

1. Step 1: Write the proportion equation
   28,866 : 64,290 = 64,290 : x
2. Step 2: Convert to fraction form
   28,866/64,290 = 64,290/x
3. Step 3: Cross multiply
   28,866x = 64,290 × 64,290
4. Step 4: Simplify right side
   28,866x = 4,133,204,100
5. Step 5: Solve for x
   x = 4,133,204,100/28,866
6. Step 6: Final answer
   x = 143,185.90