Finding the Third Proportional to 389,901 and 571,333.25

Step by Step Solution

1. Step 1: Write the proportion equation
   389,901 : 571,333.25 = 571,333.25 : x
2. Step 2: Convert to fraction form
   389,901/571,333.25 = 571,333.25/x
3. Step 3: Cross multiply
   389,901x = 571,333.25 × 571,333.25
4. Step 4: Simplify right side
   389,901x = 326,421,682,555.56
5. Step 5: Solve for x
   x = 326,421,682,555.56/389,901
6. Step 6: Final answer
   x = 837,191.19