Finding the Third Proportional to 42,699.50 and 90,942.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,699.50 : 90,942.50 = 90,942.50 : x
2. Step 2: Convert to fraction form
   42,699.50/90,942.50 = 90,942.50/x
3. Step 3: Cross multiply
   42,699.50x = 90,942.50 × 90,942.50
4. Step 4: Simplify right side
   42,699.50x = 8,270,538,306.25
5. Step 5: Solve for x
   x = 8,270,538,306.25/42,699.50
6. Step 6: Final answer
   x = 193,691.69