Finding the Third Proportional to 120,906 and 263,317.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,906 : 263,317.50 = 263,317.50 : x
2. Step 2: Convert to fraction form
   120,906/263,317.50 = 263,317.50/x
3. Step 3: Cross multiply
   120,906x = 263,317.50 × 263,317.50
4. Step 4: Simplify right side
   120,906x = 69,336,105,806.25
5. Step 5: Solve for x
   x = 69,336,105,806.25/120,906
6. Step 6: Final answer
   x = 573,471.17