Finding the Third Proportional to 426,189.50 and 647,060

Step by Step Solution

1. Step 1: Write the proportion equation
   426,189.50 : 647,060 = 647,060 : x
2. Step 2: Convert to fraction form
   426,189.50/647,060 = 647,060/x
3. Step 3: Cross multiply
   426,189.50x = 647,060 × 647,060
4. Step 4: Simplify right side
   426,189.50x = 418,686,643,600
5. Step 5: Solve for x
   x = 418,686,643,600/426,189.50
6. Step 6: Final answer
   x = 982,395.49