Finding the Third Proportional to 90,406.50 and 189,075

Step by Step Solution

1. Step 1: Write the proportion equation
   90,406.50 : 189,075 = 189,075 : x
2. Step 2: Convert to fraction form
   90,406.50/189,075 = 189,075/x
3. Step 3: Cross multiply
   90,406.50x = 189,075 × 189,075
4. Step 4: Simplify right side
   90,406.50x = 35,749,355,625
5. Step 5: Solve for x
   x = 35,749,355,625/90,406.50
6. Step 6: Final answer
   x = 395,429.04