Finding the Third Proportional to 48,140 and 72,420

Step by Step Solution

1. Step 1: Write the proportion equation
   48,140 : 72,420 = 72,420 : x
2. Step 2: Convert to fraction form
   48,140/72,420 = 72,420/x
3. Step 3: Cross multiply
   48,140x = 72,420 × 72,420
4. Step 4: Simplify right side
   48,140x = 5,244,656,400
5. Step 5: Solve for x
   x = 5,244,656,400/48,140
6. Step 6: Final answer
   x = 108,945.92