Finding the Third Proportional to 644,163 and 947,300

Step by Step Solution

1. Step 1: Write the proportion equation
   644,163 : 947,300 = 947,300 : x
2. Step 2: Convert to fraction form
   644,163/947,300 = 947,300/x
3. Step 3: Cross multiply
   644,163x = 947,300 × 947,300
4. Step 4: Simplify right side
   644,163x = 897,377,290,000
5. Step 5: Solve for x
   x = 897,377,290,000/644,163
6. Step 6: Final answer
   x = 1,393,090.40