Finding the Third Proportional to 724,680 and 1,705,128

Step by Step Solution

1. Step 1: Write the proportion equation
   724,680 : 1,705,128 = 1,705,128 : x
2. Step 2: Convert to fraction form
   724,680/1,705,128 = 1,705,128/x
3. Step 3: Cross multiply
   724,680x = 1,705,128 × 1,705,128
4. Step 4: Simplify right side
   724,680x = 2,907,461,496,384
5. Step 5: Solve for x
   x = 2,907,461,496,384/724,680
6. Step 6: Final answer
   x = 4,012,062.56