Finding the Third Proportional to 91,705.50 and 189,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,705.50 : 189,121.50 = 189,121.50 : x
2. Step 2: Convert to fraction form
   91,705.50/189,121.50 = 189,121.50/x
3. Step 3: Cross multiply
   91,705.50x = 189,121.50 × 189,121.50
4. Step 4: Simplify right side
   91,705.50x = 35,766,941,762.25
5. Step 5: Solve for x
   x = 35,766,941,762.25/91,705.50
6. Step 6: Final answer
   x = 390,019.59