Finding the Third Proportional to 643,259.56 and 943,404.67

Step by Step Solution

1. Step 1: Write the proportion equation
   643,259.56 : 943,404.67 = 943,404.67 : x
2. Step 2: Convert to fraction form
   643,259.56/943,404.67 = 943,404.67/x
3. Step 3: Cross multiply
   643,259.56x = 943,404.67 × 943,404.67
4. Step 4: Simplify right side
   643,259.56x = 890,012,364,781.37
5. Step 5: Solve for x
   x = 890,012,364,781.37/643,259.56
6. Step 6: Final answer
   x = 1,383,597.57