Finding the Third Proportional to 668,437.50 and 1,443,399

Step by Step Solution

1. Step 1: Write the proportion equation
   668,437.50 : 1,443,399 = 1,443,399 : x
2. Step 2: Convert to fraction form
   668,437.50/1,443,399 = 1,443,399/x
3. Step 3: Cross multiply
   668,437.50x = 1,443,399 × 1,443,399
4. Step 4: Simplify right side
   668,437.50x = 2,083,400,673,201
5. Step 5: Solve for x
   x = 2,083,400,673,201/668,437.50
6. Step 6: Final answer
   x = 3,116,821.95