Finding the Third Proportional to 42,230 and 90,109

Step by Step Solution

1. Step 1: Write the proportion equation
   42,230 : 90,109 = 90,109 : x
2. Step 2: Convert to fraction form
   42,230/90,109 = 90,109/x
3. Step 3: Cross multiply
   42,230x = 90,109 × 90,109
4. Step 4: Simplify right side
   42,230x = 8,119,631,881
5. Step 5: Solve for x
   x = 8,119,631,881/42,230
6. Step 6: Final answer
   x = 192,271.65