Finding the Third Proportional to 229,876.50 and 345,126

Step by Step Solution

1. Step 1: Write the proportion equation
   229,876.50 : 345,126 = 345,126 : x
2. Step 2: Convert to fraction form
   229,876.50/345,126 = 345,126/x
3. Step 3: Cross multiply
   229,876.50x = 345,126 × 345,126
4. Step 4: Simplify right side
   229,876.50x = 119,111,955,876
5. Step 5: Solve for x
   x = 119,111,955,876/229,876.50
6. Step 6: Final answer
   x = 518,156.30