Finding the Third Proportional to 109,207.50 and 238,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,207.50 : 238,618.50 = 238,618.50 : x
2. Step 2: Convert to fraction form
   109,207.50/238,618.50 = 238,618.50/x
3. Step 3: Cross multiply
   109,207.50x = 238,618.50 × 238,618.50
4. Step 4: Simplify right side
   109,207.50x = 56,938,788,542.25
5. Step 5: Solve for x
   x = 56,938,788,542.25/109,207.50
6. Step 6: Final answer
   x = 521,381.67