Finding the Third Proportional to 531,392 and 789,560

Step by Step Solution

1. Step 1: Write the proportion equation
   531,392 : 789,560 = 789,560 : x
2. Step 2: Convert to fraction form
   531,392/789,560 = 789,560/x
3. Step 3: Cross multiply
   531,392x = 789,560 × 789,560
4. Step 4: Simplify right side
   531,392x = 623,404,993,600
5. Step 5: Solve for x
   x = 623,404,993,600/531,392
6. Step 6: Final answer
   x = 1,173,154.65