Finding the Third Proportional to 131,289 and 288,106.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,289 : 288,106.50 = 288,106.50 : x
2. Step 2: Convert to fraction form
   131,289/288,106.50 = 288,106.50/x
3. Step 3: Cross multiply
   131,289x = 288,106.50 × 288,106.50
4. Step 4: Simplify right side
   131,289x = 83,005,355,342.25
5. Step 5: Solve for x
   x = 83,005,355,342.25/131,289
6. Step 6: Final answer
   x = 632,233.89