Finding the Third Proportional to 643,239 and 971,410.50

Step by Step Solution

1. Step 1: Write the proportion equation
   643,239 : 971,410.50 = 971,410.50 : x
2. Step 2: Convert to fraction form
   643,239/971,410.50 = 971,410.50/x
3. Step 3: Cross multiply
   643,239x = 971,410.50 × 971,410.50
4. Step 4: Simplify right side
   643,239x = 943,638,359,510.25
5. Step 5: Solve for x
   x = 943,638,359,510.25/643,239
6. Step 6: Final answer
   x = 1,467,010.49