Finding the Third Proportional to 367,389 and 561,991.50

Step by Step Solution

1. Step 1: Write the proportion equation
   367,389 : 561,991.50 = 561,991.50 : x
2. Step 2: Convert to fraction form
   367,389/561,991.50 = 561,991.50/x
3. Step 3: Cross multiply
   367,389x = 561,991.50 × 561,991.50
4. Step 4: Simplify right side
   367,389x = 315,834,446,072.25
5. Step 5: Solve for x
   x = 315,834,446,072.25/367,389
6. Step 6: Final answer
   x = 859,673.12