Finding the Third Proportional to 414,288 and 907,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   414,288 : 907,621.50 = 907,621.50 : x
2. Step 2: Convert to fraction form
   414,288/907,621.50 = 907,621.50/x
3. Step 3: Cross multiply
   414,288x = 907,621.50 × 907,621.50
4. Step 4: Simplify right side
   414,288x = 823,776,787,262.25
5. Step 5: Solve for x
   x = 823,776,787,262.25/414,288
6. Step 6: Final answer
   x = 1,988,415.76