Finding the Third Proportional to 221,403 and 343,768.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,403 : 343,768.50 = 343,768.50 : x
2. Step 2: Convert to fraction form
   221,403/343,768.50 = 343,768.50/x
3. Step 3: Cross multiply
   221,403x = 343,768.50 × 343,768.50
4. Step 4: Simplify right side
   221,403x = 118,176,781,592.25
5. Step 5: Solve for x
   x = 118,176,781,592.25/221,403
6. Step 6: Final answer
   x = 533,763.24