Finding the Third Proportional to 133,453.50 and 290,139

Step by Step Solution

1. Step 1: Write the proportion equation
   133,453.50 : 290,139 = 290,139 : x
2. Step 2: Convert to fraction form
   133,453.50/290,139 = 290,139/x
3. Step 3: Cross multiply
   133,453.50x = 290,139 × 290,139
4. Step 4: Simplify right side
   133,453.50x = 84,180,639,321
5. Step 5: Solve for x
   x = 84,180,639,321/133,453.50
6. Step 6: Final answer
   x = 630,786.30