Finding the Third Proportional to 270,243 and 420,673.50

Step by Step Solution

1. Step 1: Write the proportion equation
   270,243 : 420,673.50 = 420,673.50 : x
2. Step 2: Convert to fraction form
   270,243/420,673.50 = 420,673.50/x
3. Step 3: Cross multiply
   270,243x = 420,673.50 × 420,673.50
4. Step 4: Simplify right side
   270,243x = 176,966,193,602.25
5. Step 5: Solve for x
   x = 176,966,193,602.25/270,243
6. Step 6: Final answer
   x = 654,840.99