Finding the Third Proportional to 65,611.50 and 99,405

Step by Step Solution

1. Step 1: Write the proportion equation
   65,611.50 : 99,405 = 99,405 : x
2. Step 2: Convert to fraction form
   65,611.50/99,405 = 99,405/x
3. Step 3: Cross multiply
   65,611.50x = 99,405 × 99,405
4. Step 4: Simplify right side
   65,611.50x = 9,881,354,025
5. Step 5: Solve for x
   x = 9,881,354,025/65,611.50
6. Step 6: Final answer
   x = 150,604.00