Finding the Third Proportional to 687,811.50 and 917,325

Step by Step Solution

1. Step 1: Write the proportion equation
   687,811.50 : 917,325 = 917,325 : x
2. Step 2: Convert to fraction form
   687,811.50/917,325 = 917,325/x
3. Step 3: Cross multiply
   687,811.50x = 917,325 × 917,325
4. Step 4: Simplify right side
   687,811.50x = 841,485,155,625
5. Step 5: Solve for x
   x = 841,485,155,625/687,811.50
6. Step 6: Final answer
   x = 1,223,424.09