Finding the Third Proportional to 670,128 and 1,445,228

Step by Step Solution

1. Step 1: Write the proportion equation
   670,128 : 1,445,228 = 1,445,228 : x
2. Step 2: Convert to fraction form
   670,128/1,445,228 = 1,445,228/x
3. Step 3: Cross multiply
   670,128x = 1,445,228 × 1,445,228
4. Step 4: Simplify right side
   670,128x = 2,088,683,971,984
5. Step 5: Solve for x
   x = 2,088,683,971,984/670,128
6. Step 6: Final answer
   x = 3,116,843.31