Finding the Third Proportional to 643,180 and 945,501

Step by Step Solution

1. Step 1: Write the proportion equation
   643,180 : 945,501 = 945,501 : x
2. Step 2: Convert to fraction form
   643,180/945,501 = 945,501/x
3. Step 3: Cross multiply
   643,180x = 945,501 × 945,501
4. Step 4: Simplify right side
   643,180x = 893,972,141,001
5. Step 5: Solve for x
   x = 893,972,141,001/643,180
6. Step 6: Final answer
   x = 1,389,925.28