Finding the Third Proportional to 221,017.50 and 337,869

Step by Step Solution

1. Step 1: Write the proportion equation
   221,017.50 : 337,869 = 337,869 : x
2. Step 2: Convert to fraction form
   221,017.50/337,869 = 337,869/x
3. Step 3: Cross multiply
   221,017.50x = 337,869 × 337,869
4. Step 4: Simplify right side
   221,017.50x = 114,155,461,161
5. Step 5: Solve for x
   x = 114,155,461,161/221,017.50
6. Step 6: Final answer
   x = 516,499.65