Finding the Third Proportional to 34,280 and 74,320

Step by Step Solution

1. Step 1: Write the proportion equation
   34,280 : 74,320 = 74,320 : x
2. Step 2: Convert to fraction form
   34,280/74,320 = 74,320/x
3. Step 3: Cross multiply
   34,280x = 74,320 × 74,320
4. Step 4: Simplify right side
   34,280x = 5,523,462,400
5. Step 5: Solve for x
   x = 5,523,462,400/34,280
6. Step 6: Final answer
   x = 161,127.84