Finding the Third Proportional to 28,215 and 60,315

Step by Step Solution

1. Step 1: Write the proportion equation
   28,215 : 60,315 = 60,315 : x
2. Step 2: Convert to fraction form
   28,215/60,315 = 60,315/x
3. Step 3: Cross multiply
   28,215x = 60,315 × 60,315
4. Step 4: Simplify right side
   28,215x = 3,637,899,225
5. Step 5: Solve for x
   x = 3,637,899,225/28,215
6. Step 6: Final answer
   x = 128,934.94