Finding the Third Proportional to 620,013 and 877,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   620,013 : 877,561.50 = 877,561.50 : x
2. Step 2: Convert to fraction form
   620,013/877,561.50 = 877,561.50/x
3. Step 3: Cross multiply
   620,013x = 877,561.50 × 877,561.50
4. Step 4: Simplify right side
   620,013x = 770,114,186,282.25
5. Step 5: Solve for x
   x = 770,114,186,282.25/620,013
6. Step 6: Final answer
   x = 1,242,093.61