Finding the Third Proportional to 108,218 and 231,137.50

Step by Step Solution

1. Step 1: Write the proportion equation
   108,218 : 231,137.50 = 231,137.50 : x
2. Step 2: Convert to fraction form
   108,218/231,137.50 = 231,137.50/x
3. Step 3: Cross multiply
   108,218x = 231,137.50 × 231,137.50
4. Step 4: Simplify right side
   108,218x = 53,424,543,906.25
5. Step 5: Solve for x
   x = 53,424,543,906.25/108,218
6. Step 6: Final answer
   x = 493,675.21