Finding the Third Proportional to 28,216 and 61,290

Step by Step Solution

1. Step 1: Write the proportion equation
   28,216 : 61,290 = 61,290 : x
2. Step 2: Convert to fraction form
   28,216/61,290 = 61,290/x
3. Step 3: Cross multiply
   28,216x = 61,290 × 61,290
4. Step 4: Simplify right side
   28,216x = 3,756,464,100
5. Step 5: Solve for x
   x = 3,756,464,100/28,216
6. Step 6: Final answer
   x = 133,132.41