Finding the Third Proportional to 329,820 and 706,280

Step by Step Solution

1. Step 1: Write the proportion equation
   329,820 : 706,280 = 706,280 : x
2. Step 2: Convert to fraction form
   329,820/706,280 = 706,280/x
3. Step 3: Cross multiply
   329,820x = 706,280 × 706,280
4. Step 4: Simplify right side
   329,820x = 498,831,438,400
5. Step 5: Solve for x
   x = 498,831,438,400/329,820
6. Step 6: Final answer
   x = 1,512,435.38