Finding the Third Proportional to 131,772 and 289,786

Step by Step Solution

1. Step 1: Write the proportion equation
   131,772 : 289,786 = 289,786 : x
2. Step 2: Convert to fraction form
   131,772/289,786 = 289,786/x
3. Step 3: Cross multiply
   131,772x = 289,786 × 289,786
4. Step 4: Simplify right side
   131,772x = 83,975,925,796
5. Step 5: Solve for x
   x = 83,975,925,796/131,772
6. Step 6: Final answer
   x = 637,282.02