Finding the Third Proportional to 385,991.50 and 850,512

Step by Step Solution

1. Step 1: Write the proportion equation
   385,991.50 : 850,512 = 850,512 : x
2. Step 2: Convert to fraction form
   385,991.50/850,512 = 850,512/x
3. Step 3: Cross multiply
   385,991.50x = 850,512 × 850,512
4. Step 4: Simplify right side
   385,991.50x = 723,370,662,144
5. Step 5: Solve for x
   x = 723,370,662,144/385,991.50
6. Step 6: Final answer
   x = 1,874,058.53