Finding the Third Proportional to 90,406.50 and 196,669.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,406.50 : 196,669.50 = 196,669.50 : x
2. Step 2: Convert to fraction form
   90,406.50/196,669.50 = 196,669.50/x
3. Step 3: Cross multiply
   90,406.50x = 196,669.50 × 196,669.50
4. Step 4: Simplify right side
   90,406.50x = 38,678,892,230.25
5. Step 5: Solve for x
   x = 38,678,892,230.25/90,406.50
6. Step 6: Final answer
   x = 427,833.09