Finding the Third Proportional to 638,456 and 945,300

Step by Step Solution

1. Step 1: Write the proportion equation
   638,456 : 945,300 = 945,300 : x
2. Step 2: Convert to fraction form
   638,456/945,300 = 945,300/x
3. Step 3: Cross multiply
   638,456x = 945,300 × 945,300
4. Step 4: Simplify right side
   638,456x = 893,592,090,000
5. Step 5: Solve for x
   x = 893,592,090,000/638,456
6. Step 6: Final answer
   x = 1,399,614.21