Finding the Third Proportional to 66,970 and 144,300

Step by Step Solution

1. Step 1: Write the proportion equation
   66,970 : 144,300 = 144,300 : x
2. Step 2: Convert to fraction form
   66,970/144,300 = 144,300/x
3. Step 3: Cross multiply
   66,970x = 144,300 × 144,300
4. Step 4: Simplify right side
   66,970x = 20,822,490,000
5. Step 5: Solve for x
   x = 20,822,490,000/66,970
6. Step 6: Final answer
   x = 310,922.65