Finding the Third Proportional to 70,370 and 149,890

Step by Step Solution

1. Step 1: Write the proportion equation
   70,370 : 149,890 = 149,890 : x
2. Step 2: Convert to fraction form
   70,370/149,890 = 149,890/x
3. Step 3: Cross multiply
   70,370x = 149,890 × 149,890
4. Step 4: Simplify right side
   70,370x = 22,467,012,100
5. Step 5: Solve for x
   x = 22,467,012,100/70,370
6. Step 6: Final answer
   x = 319,269.75