Finding the Third Proportional to 492,912 and 712,152

Step by Step Solution

1. Step 1: Write the proportion equation
   492,912 : 712,152 = 712,152 : x
2. Step 2: Convert to fraction form
   492,912/712,152 = 712,152/x
3. Step 3: Cross multiply
   492,912x = 712,152 × 712,152
4. Step 4: Simplify right side
   492,912x = 507,160,471,104
5. Step 5: Solve for x
   x = 507,160,471,104/492,912
6. Step 6: Final answer
   x = 1,028,906.72