Finding the Third Proportional to 133,140 and 289,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   133,140 : 289,789.50 = 289,789.50 : x
2. Step 2: Convert to fraction form
   133,140/289,789.50 = 289,789.50/x
3. Step 3: Cross multiply
   133,140x = 289,789.50 × 289,789.50
4. Step 4: Simplify right side
   133,140x = 83,977,954,310.25
5. Step 5: Solve for x
   x = 83,977,954,310.25/133,140
6. Step 6: Final answer
   x = 630,749.24