Finding the Third Proportional to 219,115 and 338,347.50

Step by Step Solution

1. Step 1: Write the proportion equation
   219,115 : 338,347.50 = 338,347.50 : x
2. Step 2: Convert to fraction form
   219,115/338,347.50 = 338,347.50/x
3. Step 3: Cross multiply
   219,115x = 338,347.50 × 338,347.50
4. Step 4: Simplify right side
   219,115x = 114,479,030,756.25
5. Step 5: Solve for x
   x = 114,479,030,756.25/219,115
6. Step 6: Final answer
   x = 522,460.95