Finding the Third Proportional to 251,172 and 351,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   251,172 : 351,328.50 = 351,328.50 : x
2. Step 2: Convert to fraction form
   251,172/351,328.50 = 351,328.50/x
3. Step 3: Cross multiply
   251,172x = 351,328.50 × 351,328.50
4. Step 4: Simplify right side
   251,172x = 123,431,714,912.25
5. Step 5: Solve for x
   x = 123,431,714,912.25/251,172
6. Step 6: Final answer
   x = 491,423.07