Finding the Third Proportional to 221,259 and 351,796.50

Step by Step Solution

1. Step 1: Write the proportion equation
   221,259 : 351,796.50 = 351,796.50 : x
2. Step 2: Convert to fraction form
   221,259/351,796.50 = 351,796.50/x
3. Step 3: Cross multiply
   221,259x = 351,796.50 × 351,796.50
4. Step 4: Simplify right side
   221,259x = 123,760,777,412.25
5. Step 5: Solve for x
   x = 123,760,777,412.25/221,259
6. Step 6: Final answer
   x = 559,347.99