Finding the Third Proportional to 409,621.50 and 870,912

Step by Step Solution

1. Step 1: Write the proportion equation
   409,621.50 : 870,912 = 870,912 : x
2. Step 2: Convert to fraction form
   409,621.50/870,912 = 870,912/x
3. Step 3: Cross multiply
   409,621.50x = 870,912 × 870,912
4. Step 4: Simplify right side
   409,621.50x = 758,487,711,744
5. Step 5: Solve for x
   x = 758,487,711,744/409,621.50
6. Step 6: Final answer
   x = 1,851,679.44