Finding the Third Proportional to 42,658.50 and 90,234

Step by Step Solution

1. Step 1: Write the proportion equation
   42,658.50 : 90,234 = 90,234 : x
2. Step 2: Convert to fraction form
   42,658.50/90,234 = 90,234/x
3. Step 3: Cross multiply
   42,658.50x = 90,234 × 90,234
4. Step 4: Simplify right side
   42,658.50x = 8,142,174,756
5. Step 5: Solve for x
   x = 8,142,174,756/42,658.50
6. Step 6: Final answer
   x = 190,868.75