Finding the Third Proportional to 105,490.50 and 231,009

Step by Step Solution

1. Step 1: Write the proportion equation
   105,490.50 : 231,009 = 231,009 : x
2. Step 2: Convert to fraction form
   105,490.50/231,009 = 231,009/x
3. Step 3: Cross multiply
   105,490.50x = 231,009 × 231,009
4. Step 4: Simplify right side
   105,490.50x = 53,365,158,081
5. Step 5: Solve for x
   x = 53,365,158,081/105,490.50
6. Step 6: Final answer
   x = 505,876.44