Finding the Third Proportional to 643,320 and 946,264

Step by Step Solution

1. Step 1: Write the proportion equation
   643,320 : 946,264 = 946,264 : x
2. Step 2: Convert to fraction form
   643,320/946,264 = 946,264/x
3. Step 3: Cross multiply
   643,320x = 946,264 × 946,264
4. Step 4: Simplify right side
   643,320x = 895,415,557,696
5. Step 5: Solve for x
   x = 895,415,557,696/643,320
6. Step 6: Final answer
   x = 1,391,866.50