Finding the Third Proportional to 221,486 and 343,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,486 : 343,619.50 = 343,619.50 : x
2. Step 2: Convert to fraction form
   221,486/343,619.50 = 343,619.50/x
3. Step 3: Cross multiply
   221,486x = 343,619.50 × 343,619.50
4. Step 4: Simplify right side
   221,486x = 118,074,360,780.25
5. Step 5: Solve for x
   x = 118,074,360,780.25/221,486
6. Step 6: Final answer
   x = 533,100.79