Finding the Third Proportional to 109,189.69 and 231,499.69

Step by Step Solution

1. Step 1: Write the proportion equation
   109,189.69 : 231,499.69 = 231,499.69 : x
2. Step 2: Convert to fraction form
   109,189.69/231,499.69 = 231,499.69/x
3. Step 3: Cross multiply
   109,189.69x = 231,499.69 × 231,499.69
4. Step 4: Simplify right side
   109,189.69x = 53,592,105,312.60
5. Step 5: Solve for x
   x = 53,592,105,312.60/109,189.69
6. Step 6: Final answer
   x = 490,816.55