Finding the Third Proportional to 90,418.50 and 195,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,418.50 : 195,889.50 = 195,889.50 : x
2. Step 2: Convert to fraction form
   90,418.50/195,889.50 = 195,889.50/x
3. Step 3: Cross multiply
   90,418.50x = 195,889.50 × 195,889.50
4. Step 4: Simplify right side
   90,418.50x = 38,372,696,210.25
5. Step 5: Solve for x
   x = 38,372,696,210.25/90,418.50
6. Step 6: Final answer
   x = 424,389.88