Finding the Third Proportional to 117,238 and 238,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,238 : 238,619.50 = 238,619.50 : x
2. Step 2: Convert to fraction form
   117,238/238,619.50 = 238,619.50/x
3. Step 3: Cross multiply
   117,238x = 238,619.50 × 238,619.50
4. Step 4: Simplify right side
   117,238x = 56,939,265,780.25
5. Step 5: Solve for x
   x = 56,939,265,780.25/117,238
6. Step 6: Final answer
   x = 485,672.44