Finding the Third Proportional to 140,070 and 299,820

Step by Step Solution

1. Step 1: Write the proportion equation
   140,070 : 299,820 = 299,820 : x
2. Step 2: Convert to fraction form
   140,070/299,820 = 299,820/x
3. Step 3: Cross multiply
   140,070x = 299,820 × 299,820
4. Step 4: Simplify right side
   140,070x = 89,892,032,400
5. Step 5: Solve for x
   x = 89,892,032,400/140,070
6. Step 6: Final answer
   x = 641,765.06