Finding the Third Proportional to 216,135.50 and 347,268

Step by Step Solution

1. Step 1: Write the proportion equation
   216,135.50 : 347,268 = 347,268 : x
2. Step 2: Convert to fraction form
   216,135.50/347,268 = 347,268/x
3. Step 3: Cross multiply
   216,135.50x = 347,268 × 347,268
4. Step 4: Simplify right side
   216,135.50x = 120,595,063,824
5. Step 5: Solve for x
   x = 120,595,063,824/216,135.50
6. Step 6: Final answer
   x = 557,960.46