Finding the Third Proportional to 531,436 and 789,584

Step by Step Solution

1. Step 1: Write the proportion equation
   531,436 : 789,584 = 789,584 : x
2. Step 2: Convert to fraction form
   531,436/789,584 = 789,584/x
3. Step 3: Cross multiply
   531,436x = 789,584 × 789,584
4. Step 4: Simplify right side
   531,436x = 623,442,893,056
5. Step 5: Solve for x
   x = 623,442,893,056/531,436
6. Step 6: Final answer
   x = 1,173,128.83