Finding the Third Proportional to 120,763.50 and 265,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,763.50 : 265,429.50 = 265,429.50 : x
2. Step 2: Convert to fraction form
   120,763.50/265,429.50 = 265,429.50/x
3. Step 3: Cross multiply
   120,763.50x = 265,429.50 × 265,429.50
4. Step 4: Simplify right side
   120,763.50x = 70,452,819,470.25
5. Step 5: Solve for x
   x = 70,452,819,470.25/120,763.50
6. Step 6: Final answer
   x = 583,394.98