Finding the Third Proportional to 168,390.50 and 261,465

Step by Step Solution

1. Step 1: Write the proportion equation
   168,390.50 : 261,465 = 261,465 : x
2. Step 2: Convert to fraction form
   168,390.50/261,465 = 261,465/x
3. Step 3: Cross multiply
   168,390.50x = 261,465 × 261,465
4. Step 4: Simplify right side
   168,390.50x = 68,363,946,225
5. Step 5: Solve for x
   x = 68,363,946,225/168,390.50
6. Step 6: Final answer
   x = 405,984.58