Finding the Third Proportional to 648,407 and 1,041,815

Step by Step Solution

1. Step 1: Write the proportion equation
   648,407 : 1,041,815 = 1,041,815 : x
2. Step 2: Convert to fraction form
   648,407/1,041,815 = 1,041,815/x
3. Step 3: Cross multiply
   648,407x = 1,041,815 × 1,041,815
4. Step 4: Simplify right side
   648,407x = 1,085,378,494,225
5. Step 5: Solve for x
   x = 1,085,378,494,225/648,407
6. Step 6: Final answer
   x = 1,673,915.45