Finding the Third Proportional to 668,288 and 1,577,040

Step by Step Solution

1. Step 1: Write the proportion equation
   668,288 : 1,577,040 = 1,577,040 : x
2. Step 2: Convert to fraction form
   668,288/1,577,040 = 1,577,040/x
3. Step 3: Cross multiply
   668,288x = 1,577,040 × 1,577,040
4. Step 4: Simplify right side
   668,288x = 2,487,055,161,600
5. Step 5: Solve for x
   x = 2,487,055,161,600/668,288
6. Step 6: Final answer
   x = 3,721,531.98