Finding the Third Proportional to 402,427.50 and 564,039

Step by Step Solution

1. Step 1: Write the proportion equation
   402,427.50 : 564,039 = 564,039 : x
2. Step 2: Convert to fraction form
   402,427.50/564,039 = 564,039/x
3. Step 3: Cross multiply
   402,427.50x = 564,039 × 564,039
4. Step 4: Simplify right side
   402,427.50x = 318,139,993,521
5. Step 5: Solve for x
   x = 318,139,993,521/402,427.50
6. Step 6: Final answer
   x = 790,552.32