Finding the Third Proportional to 186,991.50 and 402,495

Step by Step Solution

1. Step 1: Write the proportion equation
   186,991.50 : 402,495 = 402,495 : x
2. Step 2: Convert to fraction form
   186,991.50/402,495 = 402,495/x
3. Step 3: Cross multiply
   186,991.50x = 402,495 × 402,495
4. Step 4: Simplify right side
   186,991.50x = 162,002,225,025
5. Step 5: Solve for x
   x = 162,002,225,025/186,991.50
6. Step 6: Final answer
   x = 866,361.44