Finding the Third Proportional to 389,434.50 and 841,145

Step by Step Solution

1. Step 1: Write the proportion equation
   389,434.50 : 841,145 = 841,145 : x
2. Step 2: Convert to fraction form
   389,434.50/841,145 = 841,145/x
3. Step 3: Cross multiply
   389,434.50x = 841,145 × 841,145
4. Step 4: Simplify right side
   389,434.50x = 707,524,911,025
5. Step 5: Solve for x
   x = 707,524,911,025/389,434.50
6. Step 6: Final answer
   x = 1,816,800.80