Finding the Third Proportional to 66,572 and 144,900

Step by Step Solution

1. Step 1: Write the proportion equation
   66,572 : 144,900 = 144,900 : x
2. Step 2: Convert to fraction form
   66,572/144,900 = 144,900/x
3. Step 3: Cross multiply
   66,572x = 144,900 × 144,900
4. Step 4: Simplify right side
   66,572x = 20,996,010,000
5. Step 5: Solve for x
   x = 20,996,010,000/66,572
6. Step 6: Final answer
   x = 315,388.00