Finding the Third Proportional to 369,258 and 789,690

Step by Step Solution

1. Step 1: Write the proportion equation
   369,258 : 789,690 = 789,690 : x
2. Step 2: Convert to fraction form
   369,258/789,690 = 789,690/x
3. Step 3: Cross multiply
   369,258x = 789,690 × 789,690
4. Step 4: Simplify right side
   369,258x = 623,610,296,100
5. Step 5: Solve for x
   x = 623,610,296,100/369,258
6. Step 6: Final answer
   x = 1,688,820.00