Finding the Third Proportional to 216,158.50 and 345,317.25

Step by Step Solution

1. Step 1: Write the proportion equation
   216,158.50 : 345,317.25 = 345,317.25 : x
2. Step 2: Convert to fraction form
   216,158.50/345,317.25 = 345,317.25/x
3. Step 3: Cross multiply
   216,158.50x = 345,317.25 × 345,317.25
4. Step 4: Simplify right side
   216,158.50x = 119,244,003,147.56
5. Step 5: Solve for x
   x = 119,244,003,147.56/216,158.50
6. Step 6: Final answer
   x = 551,650.77