Finding the Third Proportional to 132,309 and 288,409.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,309 : 288,409.50 = 288,409.50 : x
2. Step 2: Convert to fraction form
   132,309/288,409.50 = 288,409.50/x
3. Step 3: Cross multiply
   132,309x = 288,409.50 × 288,409.50
4. Step 4: Simplify right side
   132,309x = 83,180,039,690.25
5. Step 5: Solve for x
   x = 83,180,039,690.25/132,309
6. Step 6: Final answer
   x = 628,680.13