Finding the Third Proportional to 668,978.25 and 953,643

Step by Step Solution

1. Step 1: Write the proportion equation
   668,978.25 : 953,643 = 953,643 : x
2. Step 2: Convert to fraction form
   668,978.25/953,643 = 953,643/x
3. Step 3: Cross multiply
   668,978.25x = 953,643 × 953,643
4. Step 4: Simplify right side
   668,978.25x = 909,434,971,449
5. Step 5: Solve for x
   x = 909,434,971,449/668,978.25
6. Step 6: Final answer
   x = 1,359,438.77