Finding the Third Proportional to 67,090 and 142,172

Step by Step Solution

1. Step 1: Write the proportion equation
   67,090 : 142,172 = 142,172 : x
2. Step 2: Convert to fraction form
   67,090/142,172 = 142,172/x
3. Step 3: Cross multiply
   67,090x = 142,172 × 142,172
4. Step 4: Simplify right side
   67,090x = 20,212,877,584
5. Step 5: Solve for x
   x = 20,212,877,584/67,090
6. Step 6: Final answer
   x = 301,280.04