Finding the Third Proportional to 42,016.50 and 90,405

Step by Step Solution

1. Step 1: Write the proportion equation
   42,016.50 : 90,405 = 90,405 : x
2. Step 2: Convert to fraction form
   42,016.50/90,405 = 90,405/x
3. Step 3: Cross multiply
   42,016.50x = 90,405 × 90,405
4. Step 4: Simplify right side
   42,016.50x = 8,173,064,025
5. Step 5: Solve for x
   x = 8,173,064,025/42,016.50
6. Step 6: Final answer
   x = 194,520.34