Finding the Third Proportional to 132,288 and 290,914.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,288 : 290,914.50 = 290,914.50 : x
2. Step 2: Convert to fraction form
   132,288/290,914.50 = 290,914.50/x
3. Step 3: Cross multiply
   132,288x = 290,914.50 × 290,914.50
4. Step 4: Simplify right side
   132,288x = 84,631,246,310.25
5. Step 5: Solve for x
   x = 84,631,246,310.25/132,288
6. Step 6: Final answer
   x = 639,749.99