Finding the Third Proportional to 52,920 and 72,900

Step by Step Solution

1. Step 1: Write the proportion equation
   52,920 : 72,900 = 72,900 : x
2. Step 2: Convert to fraction form
   52,920/72,900 = 72,900/x
3. Step 3: Cross multiply
   52,920x = 72,900 × 72,900
4. Step 4: Simplify right side
   52,920x = 5,314,410,000
5. Step 5: Solve for x
   x = 5,314,410,000/52,920
6. Step 6: Final answer
   x = 100,423.47