Finding the Third Proportional to 725,040 and 1,590,144

Step by Step Solution

1. Step 1: Write the proportion equation
   725,040 : 1,590,144 = 1,590,144 : x
2. Step 2: Convert to fraction form
   725,040/1,590,144 = 1,590,144/x
3. Step 3: Cross multiply
   725,040x = 1,590,144 × 1,590,144
4. Step 4: Simplify right side
   725,040x = 2,528,557,940,736
5. Step 5: Solve for x
   x = 2,528,557,940,736/725,040
6. Step 6: Final answer
   x = 3,487,473.71