Finding the Third Proportional to 624,009 and 891,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   624,009 : 891,715.50 = 891,715.50 : x
2. Step 2: Convert to fraction form
   624,009/891,715.50 = 891,715.50/x
3. Step 3: Cross multiply
   624,009x = 891,715.50 × 891,715.50
4. Step 4: Simplify right side
   624,009x = 795,156,532,940.25
5. Step 5: Solve for x
   x = 795,156,532,940.25/624,009
6. Step 6: Final answer
   x = 1,274,270.94