Finding the Third Proportional to 30,120 and 67,152

Step by Step Solution

1. Step 1: Write the proportion equation
   30,120 : 67,152 = 67,152 : x
2. Step 2: Convert to fraction form
   30,120/67,152 = 67,152/x
3. Step 3: Cross multiply
   30,120x = 67,152 × 67,152
4. Step 4: Simplify right side
   30,120x = 4,509,391,104
5. Step 5: Solve for x
   x = 4,509,391,104/30,120
6. Step 6: Final answer
   x = 149,714.18